It's been a long slow process, but then we're tackling new ground. She's under the knife as I type, but been so busy I haven't been able to get down there and see for myself. But I asked Michael to snap a few pics today. The tranny is out, and should've headed toward Bill today so he can supersize it. They've got the front end dismantled, and are prototyping the gear drive mount. As well as figuring out what won't be a part of the vehicle anymore. Definitely gonna need a custom bracket for the a/c. It's also gonna look a bit different from the front to ensure cooling. We're still tossing around ideas on that, but looks like twin radiators will be part of it.
I'll have more news and pics at the link below as things progess...
You and me both bud! Probably a good thing they aren't. Otherwise I'd probably be down there every day pestering them. I think they're tired enough of all my calls and emails.
Michael sent me some larger clearer images this morning and you can see things a little better now. I've revised the page at the link above.
Going with a custom cog setup from the Demons. Getting a new motor built hopefully by end of year, if I can get my pennies together. Mr. Viking already helped me out with a bare block [emoji6]
Going with a custom cog setup from the Demons. Getting a new motor built hopefully by end of year, if I can get my pennies together. Mr. Viking already helped me out with a bare block [emoji6]
Lol!! I'm like that guy from pulp fiction that had that bible verse before he popped a cap in someone's ass! That's one of my old stand by sayings.
Looking forward to seeing your beast alive again. It's gonna be a long winter!!!
Thanks bud, me too! I haven't driven it since registration day this season, and only got half a pass before the belt shredded. If it's done during winter I won't even be able to test the power. I couldn't hook on frozen pavement with the old build, so I doubt that'll get better.
Going with a custom cog setup from the Demons. Getting a new motor built hopefully by end of year, if I can get my pennies together. Mr. Viking already helped me out with a bare block [emoji6]
I'm adding a tranny temp gauge to the build, but couldn't find one that matched my boost gauge. So I decided to replace it with this matching pair. Plus my old boost gauge only goes up to 30 PSI, so I wanted to match the blower capability. Whether I run/make that much or not...
Not really build related, other than Johan said I had to switch fuel for the new build. I came across this chart from when I was testing out different fuels a while back. Far from scientific, but I did make numerous passes with each. I just picked a best case for each, at that point in time. Similar weather, etc.. And the results were all pretty similar. Not my best passes, but that wasn't the point. The 91 / Lucas Octane Boost held it's own. Ran it for several seasons, and year round. Never a single issue. In fact it always ran better than the Sunoco 104 race gas, and was much cheaper. But the 91 / Meth was the final winner for me. More importantly, Johan was good with the choice too. Anyways, take it all with a grain of salt...
Yes, and figuring out the controller is likely to be an ongoing experience. It offers numerous ways to trigger it, plus we can only guess at initial and ramp up levels. Then there are street and track setups. But I'll have plenty of time to experiment.
You get that setup working and you'll never think about belts again.
Funny you should ask. Michael and I were just discussing this yesterday. On the old setup they (it's a dual nozzle setup) were after. I'd told him long ago I wanted the IAT sensor in the rear of the manifold, so that's where it's going. The nozzles will be somewhere in the front of the manifold, so pre.
Other than thermistor manufacturing tolerances, I'm staying with the unit designed for my PCM. Not gonna cheap out or settle for close with the amount of power I'll be making. Just not sure if the grommet setup can withstand the amount of boost. I know there are screw-in types, which might be better. Just curious how you compared the scaling from the OEM to the one you went with. Spec sheet?
Wink, I used a dodge screw in IAT that had a nearly identical resistance curve. To validate it I systematically subjected the OEM sensor and the aftermarket sensor to varying temps and measured the resistance and it was well within my crudely defined control limits. The curve has a horizontal and vertical asymptote as the temps approach 100 degrees centigrade and -40 centigrade.
I will have to dig up the OEM resistance chart. Additionally, I do not remember, but the scaling may be an exposed option in CMR or HPTuners.
The sensor I used. It was 3/8NPT and an exposed element.
Sent from my iPhone using Tapatalk
Viking has been and still is a big help to me and he's my crew chief. Kindly do not distract him too much from being the brains behind my operation. Thanks TK!
I also learned that during a cold start(engine off greater than 480 minutes) the PCM analyzes the ambient air temp sensor, the IAT and ECT and if any values disagree it will trip a MIL for the sensor that is out of range.
The IAT and ECT follow the same resistance curves.
I used an AX7 IAT (3/8 NPT) with an exposed element but one could use a AX40(1/4 NPT) as well
Below are the inputs that affect base timing on the 5.7/6.1. Note that the IAT has no effect on base timing values, but the PCM will pull timing if a high IAT is found(as stated previously)
The SMP AX7 is the one I found, at several places. Seems they do a lot of OEM stuff. Then I found a cross reference that said the matching pigtail was the TX3A, but no pics. So I had to guess. Normally Michael would source all this stuff, but I'd rather he stay focused on the big stuff. I'd like to get my Jeep back sometime this decade.
The SMP AX7 is the one I found, at several places. Seems they do a lot of OEM stuff. Then I found a cross reference that said the matching pigtail was the TX3A, but no pics. So I had to guess. Normally Michael would source all this stuff, but I'd rather he stay focused on the big stuff. I'd like to get my Jeep back sometime this decade.
LOL! At least it doesn't go out in public without wrapping a blanket around itself first. Of course it might decide to start flashing other trannies down the road. :surprise:
wink
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Cherokee SRT8 Forum
1.4M posts
46.9K members
Since 2006
Our Jeep Grand Cherokee SRT8 Forum is a community dedicated to Jeep enthusiasts to discuss specs, horsepower, reviews and more!