Anyone get the new issue of motortrend - FI cars
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Joined: Mar 2004
Posts: 9,722
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From: phoenix, AZ
There aren't any Z's in the shootout, but they're all FI and all have 700-1100 hp. The benchmark car was none other than a new Z06.
They had every type of test you can think of except for road course testing - though they had Figure 8 testing.
Anyway, all these cars had HUGE power and the conclusion I'm getting from it is that it's mostly a waste unless you have slicks. All the testing was done on Michellin PS2's for all the cars. For the 1/4 mile runs, 2 of the cars also tried drag radials and one of them - the lingenfelter corvette broke a differencial with them. It seemed that the turbo cars had the hardest time hooking up with PS2's, while the SC cars didn't do too bad with excessive wheel spin. They were saying you have to launch at just the right rpm, otherwise 100 rpms more just spins the tires
They all had ST, SC, and TT setups with their different shaped power curves. Otherwise having that much power really only seems to have much benefit if you're going above 100 mph. Does it really seem worthwhile to make the Z into the same class as these cars? IMO it doesn't, but then again I don't drive 160mph very often
They had every type of test you can think of except for road course testing - though they had Figure 8 testing.
Anyway, all these cars had HUGE power and the conclusion I'm getting from it is that it's mostly a waste unless you have slicks. All the testing was done on Michellin PS2's for all the cars. For the 1/4 mile runs, 2 of the cars also tried drag radials and one of them - the lingenfelter corvette broke a differencial with them. It seemed that the turbo cars had the hardest time hooking up with PS2's, while the SC cars didn't do too bad with excessive wheel spin. They were saying you have to launch at just the right rpm, otherwise 100 rpms more just spins the tires
They all had ST, SC, and TT setups with their different shaped power curves. Otherwise having that much power really only seems to have much benefit if you're going above 100 mph. Does it really seem worthwhile to make the Z into the same class as these cars? IMO it doesn't, but then again I don't drive 160mph very often
Last edited by sentry65; Apr 29, 2006 at 12:01 PM.
What you explained is the main reason to have a gear dependant boost controller. I'm surprised with all the money in those cars and the bragging rights on the line that none of them used one.
Originally Posted by theking
What you explained is the main reason to have a gear dependant boost controller. I'm surprised with all the money in those cars and the bragging rights on the line that none of them used one.
Originally Posted by theking
What you explained is the main reason to have a gear dependant boost controller. I'm surprised with all the money in those cars and the bragging rights on the line that none of them used one.
I plan to set this up in a few weeks to run the following
this is with two 60-1 turbos (upgraded td0518g's)estimated power with a 3.8l, 100mm pistons (estimating 30whp per psi, we'll see
)1st gear 10psi-500whp
2nd gear 11psi-530whp
3rd gear 13psi- 590whp
4th gear 15psi- 650whp
5th gear 17psi-710whp
6th gear 20psi-800whp
I should have my car up and running in about 2 weeks
Thread Starter
Joined: Mar 2004
Posts: 9,722
Likes: 2
From: phoenix, AZ
people have been talking about doing that for months and months, but I haven't seen anyone do it yet. Look forward to seeing it done.
Seems to me it'd be an issue with limiting midrange peak torque by reducing boost and timing in that area rather than boost in the entire rpm range for that gear
Seems to me it'd be an issue with limiting midrange peak torque by reducing boost and timing in that area rather than boost in the entire rpm range for that gear
im setting up 2 stage boost control this year to help this issue. the setup i have doesnt support tons stages... but i think even just 2 stage will help a lot... i will have it kick into high boost when i shift into 3rd most likely
ill have to find this magazine, it might be interesting.
ill have to find this magazine, it might be interesting.
Yeah, I bought that issue of MT at the airport. I read the whole thing. Only one of the cars passed their SMOG test. A lot of the cars also didn't live up to their "claimed" hp numbers. Too much power. Gotta find that power/weight ratio. All of those cars also weighed a few hundred lbs MORE than the ZO6. It's all about the overall package. The MTI GTO was kind of weird with the rear mounted turbo, but it's not the first time I've heard of that.
I like how the Ford GT was the easiest to drive....didn't really require a lot of effort to drive it correctly. It was a good test, but they also allowed the cars to up their boost during things like the top speed run. So it didn't make sense to dyno them at one boost level, and then up it for the tests.
And when the Lingenfelter (t!ts...haha) ate it's rear diff...that was funny...being that it was the most expensive car at $225,000 but it still had the stock C6 diff in it.
I like how the Ford GT was the easiest to drive....didn't really require a lot of effort to drive it correctly. It was a good test, but they also allowed the cars to up their boost during things like the top speed run. So it didn't make sense to dyno them at one boost level, and then up it for the tests.
And when the Lingenfelter (t!ts...haha) ate it's rear diff...that was funny...being that it was the most expensive car at $225,000 but it still had the stock C6 diff in it.
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That would be true if you had timing and boost maps for each gear but I don't know of any EMS available for the VQ35 that have this option.
Originally Posted by sentry65
Seems to me it'd be an issue with limiting midrange peak torque by reducing boost and timing in that area rather than boost in the entire rpm range for that gear
Thread Starter
Joined: Mar 2004
Posts: 9,722
Likes: 2
From: phoenix, AZ
yeah in another magazine that reviewed the lingenfelter C6, even back then lingenfelter said if you plan on launching the car hard the rear diff should be upgraded - they should have listened to themselves. That car IMO is almost worthless. It needs slicks/drag radials to get traction, but if you use them the rear diff breaks....yeah maybe that can be an easy fix though with upgrading the diff.
I thought it was weird too that some of the cars started adjusting their boost levels for some of the races.
Yeah the failing of the smog test was interesting, though they acted like doing some minor adjusting they could get the car to barely pass smog. It seemed like they all barely didn't pass smog - and came there being fully tuned out and ready to race. I'd take the slightly modded Ford GT anyday over any of those cars, but that's just me.
I wish we knew the tire sizes for the different cars - maybe that's on their website though where they said there's more info
I thought it was weird too that some of the cars started adjusting their boost levels for some of the races.
Yeah the failing of the smog test was interesting, though they acted like doing some minor adjusting they could get the car to barely pass smog. It seemed like they all barely didn't pass smog - and came there being fully tuned out and ready to race. I'd take the slightly modded Ford GT anyday over any of those cars, but that's just me.
I wish we knew the tire sizes for the different cars - maybe that's on their website though where they said there's more info
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