I have the 2.97 First gear Magnum with 4:88s. The car does 137 mph in 4th gear at 8k RPM.
CJ,SCJ,CAMS etc.
- Thread starter darreng505
- Start date
What size tire? Also. What clutch?
That's the exact same rpm range, trans ratios and rear gears I have, albeit with barely over 480rwhp. 2nd gear is still usable, coming out of low-speed turns. There are 4.30s available, if you search around. I wouldn't go any shorter, but that's just me. 3.73s weren't quite enough for my taste.
28". 275/60/15. Custom Spec 2+ Hybrid with aluminum pressure plate and flywheel.
Something just glorious about that statement
It does sound good lol....
Mine does about 156mph in 4th at 7800.
Did Livernois port your heads?
They re programmed their head porting cnc program to work with boss head casts (new ones i bought). Ported. Bowled. Polished and additional hand work for cam clearance.
I called them today and they told me $3600 for Port and my core wouldn't matter.....that's insane!!!!
RGR Stage 1 is $2500.....best deal so far
Yeah. Stage 3 type heads are pretty much $3k plus some hand work. What livernois will do is make you a custom cncd head from new castings. Design for your application. Same with RGR and all the best engine shops.
You got to be a little crazy like Sean and me to overlook the $'s per gain. Heads like that will work best in a complete system.
You got to be a little crazy like Sean and me to overlook the $'s per gain. Heads like that will work best in a complete system.
I'm just running the CJ setup on E85 now but just ordered Stage 3 Cams
Update:
So I may have mentioned I was having an issue with the engine pushing the dipstick up and spitting oil. We put the updated ford valve cover, dipstick tube (longer) and dipstick (which has a much firmer fitment) and I no longer have the issue.
Honestly I think the cams just shook it loose. The old designed dipstick didn't seat particularly tight.
Also. Upped the gears to 4.56 and wow! Outran an Ariel atom off a standing start sprint race to T1 (I was on pole). Hopefully video of that soon.
Oh and T2R differential too. Amazing piece of hardware.
So I may have mentioned I was having an issue with the engine pushing the dipstick up and spitting oil. We put the updated ford valve cover, dipstick tube (longer) and dipstick (which has a much firmer fitment) and I no longer have the issue.
Honestly I think the cams just shook it loose. The old designed dipstick didn't seat particularly tight.
Also. Upped the gears to 4.56 and wow! Outran an Ariel atom off a standing start sprint race to T1 (I was on pole). Hopefully video of that soon.
Oh and T2R differential too. Amazing piece of hardware.
Awesome! 4.56 was a good choice then? How is 5th gear now? Did it help you stay out of 2nd?
What was the old diff that you switched to the T2R from? What do you like better about it? Sorry for all the questions. Haha!
What was the old diff that you switched to the T2R from? What do you like better about it? Sorry for all the questions. Haha!
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I don't use 2nd now, but 5th gear doesn't last long enough after the swap and runs out about 2 seconds before end of back straight. lol. Because I swapped it to .86 based on the 4.10's so the only thing to do now is up 6th gear to like a .75. lol The gearing is great. They don't last as long each, but they pull harder and rev faster. In my build that's a crucial strategy.
I had the old stock boss T2. The issue I was trying to resolve was the stock T2 would "shimmy" the rear end on my test corner exit throttle. A back end wiggle if you will. That was the T2 trying to find the best wheel to put the traction and in doing so, not finding any. It was being over-powered by the load transfer. Now with the T2R (higher bias) no more shimmy. Back end sinks and connects.
Dang! Bit of a catch 22 then. :/
I guess you really did need something like a 4.30 ideally.
So, the T2. At what point did it start to give you issues? Is it overpowered with the new engine? Are there any drawbacks to the T2R, like harshness of engagement?
I guess you really did need something like a 4.30 ideally.
So, the T2. At what point did it start to give you issues? Is it overpowered with the new engine? Are there any drawbacks to the T2R, like harshness of engagement?
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Still getting used to the T2R.
The T2 is fine unless your cornering force reaches a point where it overpowers the bias of the diff. For me once I got the car balance through the turn I focused on exit throttle. If I wait until the car is pointed straight, no problem with the T2 but if I want to get on throttle earlier T2R better. Also put the 302s rear sway on.
I think all the pieces that need to be there now are.
It seems like it's going great. I can't wait to see some more track videos!
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