i just spent the day at the dyno getting my new 90mm tb installed. took one hour setting up the dyno just to find out that it is impossible to dyno the damn thing. i have 2008 gc. i was told the 06-07 doesnt have as many traction controls and fuses (3 just for the final drive control). i did what everyone else does... disconnect transfer case plug, remove abs fuse and esp off with predator. truck goes into limp mode.did not disconnect tc shaft because was told it wouldnt help. managed to install the mopar cai with custom elbow and fits well, just had to shave fan shroud a little (sorry chrysler leasing). i am running mopar cai along with custom catback (dynomax x-flow with muffler delete) and diablosport predator with 91oct cai tune. added the 90mm to the ****tail and magic! cant keep the ass strait, no joke. damn shame i could not dyno to test results. i can feel crazy power upgrade from 2000-4000 rpm. the whole truck rumbles on highway and acceleration rips the tramac. now for the hard part... is there anyone out there who has custom predator tune for this particular setup?
does anyone know how to dyno 2008 srt8? i called ppp along with diablosport. no one knows.
anyways, would suggest to anyone, get the 90mm TB, its insane

Give DynoSteve a call at RDP Motorsport in Ohio, USA
he helped me out, now worries!

Good luck

i just spent the day at the dyno getting my new 90mm tb installed. took one hour setting up the dyno just to find out that it is impossible to dyno the damn thing. i have 2008 gc. i was told the 06-07 doesnt have as many traction controls and fuses (3 just for the final drive control). i did what everyone else does... disconnect transfer case plug, remove abs fuse and esp off with predator. truck goes into limp mode.did not disconnect tc shaft because was told it wouldnt help. managed to install the mopar cai with custom elbow and fits well, just had to shave fan shroud a little (sorry chrysler leasing). i am running mopar cai along with custom catback (dynomax x-flow with muffler delete) and diablosport predator with 91oct cai tune. added the 90mm to the ****tail and magic! cant keep the ass strait, no joke. damn shame i could not dyno to test results. i can feel crazy power upgrade from 2000-4000 rpm. the whole truck rumbles on highway and acceleration rips the tramac. now for the hard part... is there anyone out there who has custom predator tune for this particular setup?
does anyone know how to dyno 2008 srt8? i called ppp along with diablosport. no one knows.
anyways, would suggest to anyone, get the 90mm TB, its insane
If you are not going to disconnect the front driveshaft at the transfer case,
at least REMOVE the transfer case motor.
It has 4 bolts and can be removed in about 3 minutes.
Pulling the plug is NOT the way to dyno one of these!!!!
The transfer case motor "parks" in the last applied position which is CLUTCHES ENGAGED!
Bill

send to dynosteve pm ....hope he can help you ..

I'm shocked that your Jeep is even running without a CMR tune for the TB.

If you are not going to disconnect the front driveshaft at the transfer case,
at least REMOVE the transfer case motor.
It has 4 bolts and can be removed in about 3 minutes.
Pulling the plug is NOT the way to dyno one of these!!!!
The transfer case motor "parks" in the last applied position which is CLUTCHES ENGAGED!
Bill

with plug disconnected it was actually in 2wd. wouldnt removing the motor just do the same thing? without power to motor it might as well be out since default setting is engaged? have you done this to 2008-up GC? if it works i will definitely do it! also the main problem was that the tranny wont let me shift into gear, just automatic. thank for the help everyone

Does anyone else find it hard to believe that a 90mm TB was installed on a virtually stock 6.1 with no driveability problems?

Yup..........

This thread reads like an advertisement to me.

Which 90mm TB is this?

Maybe I should put on my 90mm Arrington and see what happens?

I wish you would Mike. I keep reading that it won't run without a tune, but this guy is saying it's a simple swap.

Does anyone else find it hard to believe that a 90mm TB was installed on a virtually stock 6.1 with no driveability problems?


More than shocked. I know 3 guys who had them installed on mildly to moderately modded cars and their car would go into limp mode numerous times in a day. It got to the point that they won't drive it without getting it tuned for the 90mm. Plus on anything short of a stroker I've seen no hp gains from the 90mm tbody. The only thing they all notice was faster throttle responce.

I guess it was too good to be true. :(

I guess it was too good to be true. :(

this is no joke ladies and gentlemen. although i cannot prove that the trottle body is actually giving more power since the 2008 srt8 is so hard to dyno, i can feel a tremendous power difference right from 2000rpm. my truck has not gone into limp mode since i installed it 2 days ago and i have already filled my truck up twice. i bought this tb from ppp, it is not the forged model but the cast along with a port modification done from ppp. my truck has custom catback along with mopar cai and predator 91oct cai tune. pictures of the install attached( its very cold and snowy here in montreal, forgive the dirty ride).

Why is the 2008 SO HARD to dyno? It's no different than any other. You're just not doing it right. I've dyno'd mine plenty of times as well as many other people.

Why is the 2008 SO HARD to dyno? It's no different than any other. You're just not doing it right. I've dyno'd mine plenty of times as well as many other people.

sorry to sound like a newb, but how exactly did you dyno it. is there an order in which i have to do things. like i said before, i disconnected plug and abs fuse, then dyno mode on predator. truck went into limp mode right away, am also dynoing on dynapack rear only

Like BBill said.... disconnect the front shaft and REMOVE the motor. I have an 07 and simply put it in "DYNO MODE" and no issues.

HMMMMMM...somethings fishy here...NO CMR tune and a working TB?...

I've never seen that type of 90mm TB before. Are you certain it's 90MM and not 85? Cast equals price saving. If you don't mind me asking me, how much was the TB?

http://www.cherokeesrt8.com/forums/attachment.php?attachmentid=7303&d=1232329423

the elbow i had to order was to match exactly diameter on mopar intake tube. 3.5 inches if im not mistaken, which converts to 88mm, safe to say 90mm? i got it from ppp and i didnt bother measuring since they only have a 90mm tb

I've never seen that type of 90mm TB before. Are you certain it's 90MM and not 85? Cast equals price saving. If you don't mind me asking me, how much was the TB?

http://www.cherokeesrt8.com/forums/attachment.php?attachmentid=7303&d=1232329423


That is not the 90mm throttle body in the pic above. That is LM Speed casted version that is more like 85-87mm.

That is not the 90mm throttle body in the pic above.

It is one of the photos above, but I'm not certifying that it's 90mm though.

Have you seen this style of TB for the 5.7/6.1 before?

It is one of the photos above, but I'm not certifying that it's 90mm though.

Have you seen this style of TB for the 5.7/6.1 before?

Yes, it's sold by LM Speed. It's a gm throttle body if I'm not mistaken. It's actually 85-87mm.

http://www.lmspeed.com/90mmthrottlebodywplugandplayharness.aspx

Yes, it's made by LM Speed. It's a gm throttle body if I'm not mistaken. It's actually 85-87mm.

That explains a lot.

Yes, thats the LM Speed kit. It uses an LS2 throttle body thats been modified for use on the Hemi and they use an adapter plate for mounting. I was going to go that way except the butthead refused to modify my throttle body. There was no way I was spending $600 for his kit, when I already had all the parts.

His loss. Now I still have all the parts, which I will work on myself, and I gave the $600 to Andy for an Arrington Billet 90.

Here is hemi31's on lxforums review of it early last year...

http://www.lxforums.com/board/showpost.php?p=1539090&postcount=1

Your right. It's $699 on their website and it's advertised as being 90MM.

"This cast aluminum 90 MM throttle body is specifically calibrated for 5.7/6.1 Hemi engines, and every one is tested on an actual SRT8 Hemi vehicle before shipping. These throttle bodies will bolt on to our Stage 2 or 3 intake manifolds, and include a plug and splice adapter harness. Sold outright, no core charges *requires Stage 2 manifold upgrade - sold seperately"


http://www.lmspeed.com/90mmthrottlebodywplugandplayharness.aspx

http://www.lmspeed.com/productimages/Shop%20pics%20120.jpg

Your right. It's $699 on their website and it's advertised as being 90MM.

"This cast aluminum 90 MM throttle body is specifically calibrated for 5.7/6.1 Hemi engines, and every one is tested on an actual SRT8 Hemi vehicle before shipping. These throttle bodies will bolt on to our Stage 2 or 3 intake manifolds, and include a plug and splice adapter harness. Sold outright, no core charges *requires Stage 2 manifold upgrade - sold seperately"


http://www.lmspeed.com/90mmthrottlebodywplugandplayharness.aspx

http://www.lmspeed.com/productimages/Shop%20pics%20120.jpg


However, it's not 90mm. They say it is though...:confused: Hemi31 measured it and 85 on one side and 87 on the other.

thats the same as mine, same wire and directions paper. this tb is insane. came with adapter and gasket along with all bolts.

Mate you do not have a 90mmTB
please check ou the link below.
http://www.arringtonengines.com/p-310-hemi-90mm-throttle-body.aspx

Don't worry if it's working keep it, just get DynoSteve to tune it for you everything will be sweet and you will love it except for all the speeding tickets.

This is what is should look like,

He does have a 90mm TB, just not an Arrington. At its widest point the LS2 TB is 90mm, same as the Modern Muscle one is 85mm. He also has an adapter choking it down to around 80mm, so whats the point? Normally I'd say that the increased velocity would be good, but when its between the TB and manifold theres no point, because the engine will only take in the air it can use, which in his case will never be enough to get the velocity increase thats possible.

He does have a 90mm TB, just not an Arrington. At its widest point the LS2 TB is 90mm, same as the Modern Muscle one is 85mm. He also has an adapter choking it down to around 80mm, so whats the point? Normally I'd say that the increased velocity would be good, but when its between the TB and manifold theres no point, because the engine will only take in the air it can use, which in his case will never be enough to get the velocity increase thats possible.

Not according to people I know who have it on their hemi.

I have one in front of me. There is a point in which its 90mm. The bore is not, but when angled the way the plate angles, it does hit 90.

Im really confused now. We only bought 2 of those LM Speed tb's in the last 6 months and I have not sold either of them.

Did you buy this from Tim and if so, do you have a copy of your invoice? I will be at the shop tomorrow and I will be checking our TB inventory. When did you make this purchase?




Guys, this is not some advertisement for PPP. If I put someone up to this, it would be for a product we still sell. We no longer sell the Arrington TB or the LM Speed TB.

[QUOTE=Power Ported Performance;337211
Guys, this is not some advertisement for PPP. If I put someone up to this, it would be for a product we still sell. We no longer sell the Arrington TB or the LM Speed TB.[/QUOTE]\\

Might be for a different topic, but how come your not selling them any longer? I have been told that the TB is close to a "pointless" mod on the Jeep?

I'm curious why you don't sell the Arringtons anymore either? When you first released them there was this huge hoopla, 23hp, 18ft/lbs, etc, etc, etc, and now you don't even carry them? What has happened between then and now?

I'm curious why you don't sell the Arringtons anymore either? When you first released them there was this huge hoopla, 23hp, 18ft/lbs, etc, etc, etc, and now you don't even carry them? What has happened between then and now?

Mike, I bet your feeling as though you've been left holding the bag. :(

I'm curious why you don't sell the Arringtons anymore either? When you first released them there was this huge hoopla, 23hp, 18ft/lbs, etc, etc, etc, and now you don't even carry them? What has happened between then and now?



There just isnt a large demand for them.





















Oh and the cast unit is about to be released in 85mm and 90mm options. We still run one on our car which is what took us from 498rwhp to 519rwhp.

I have one in front of me. There is a point in which its 90mm. The bore is not, but when angled the way the plate angles, it does hit 90.

HMM, Probably thats why he is not having the driving issues most have with Arringtons which is 90mm all the way through.

\

Might be for a different topic, but how come your not selling them any longer? I have been told that the TB is close to a "pointless" mod on the Jeep?

Very true. This have been proven on the dyno and on the track in front of my own eyes. If you don't have a stroker or not planning on getting one it's pointless mod.

We still have our 2 tb's like the one you have. Not sure you bought it from us, we havent sold any and we are not missing any inventory.

Very true. This have been proven on the dyno and on the track in front of my own eyes. If you don't have a stroker or not planning on getting one it's pointless mod.


I'm planning on proving otherwise. :D

What the hell is going on?

This is getting really strange.

I'm planning on proving otherwise. :D

I, for one, will be looking for the results

I'm planning on proving otherwise. :D

I hope you do...I'll hate to see you waste money.

I'm planning on proving otherwise. :D

I hope you do...I'll hate to see you waste money.

That wasnt a PPP transaction. That was my personal tb that I sold.

I do however have 1 Arrington TB and 2 of the tb's mentioned in this thread that i am willing to sell at a steep discount if anyone is interested.

just spoke to my buddy at the shop where i bought the tb. as it turns out he cancelled order at ppp and ordered from LM speed. sorry for the red flags guys. as it turns out at the time ppp didnt have anymore tbs.

just spoke to my buddy at the shop where i bought the tb. as it turns out he cancelled order at ppp and ordered from LM speed. sorry for the red flags guys. as it turns out at the time ppp didnt have anymore tbs.


This makes a little more sense. No problem, I was just confused as to what was going on. lol.