Technical Tips > Engines - Carbies - Exhausts - Dissys
Performance Intake manifolds C4
Vette Obsessed:
--- Quote ---Originally posted by 87Z51
You don't want 3.5s with a TPI in any form , 3.07s are the best combo for street / strip.The TPI with the mods you are looking at will not rev high enough to make use of the gears.All you will get is wheelspin without DRs.
TPIs make torque ,getting the power to the ground is hard enough stock.
Ask VO why his car goes 13mph faster in the quarter than mine but only .1 sec faster ET.sh#t loads more Hp but no traction and he has good tyres.
Get the headers ,forget the TB upgrade until you get into cams , but a cam can really wake a L98 up.Get a Hi flow cat and some decent mufflers.
Mine ;ZZ4 cam , saimised base , stock runners ,plenum and TB , headers,Hi flow cat.13.1 / 102 in full street trim on street tyres, WHEN I get traction.
--- End quote ---
Not wanting to negate 87Z51's point as I agree with him 100%, I do have to state part of my issue with my ET being what it is is also clutch slip (not just from launch). Just mentioning that so that people are aware that while I agree that traction is a big issue it is not my only issue accounting for the ET/MPH difference in the example provided. For what its worth my (non expert) estimate is that my clutch is costing me at 2-3 tenths of a second as a realistic minimum.
Clutch should finally be coming out soon so I will provide news when I have it. ;27
I definitely agree with 87Z51's mod suggestions for a quick TPI on a reasonable budget. Unless you are running 2.59's or 2.73's I wouldn't think about a diff ratio change for the reasons stated by 87Z51.
77CVT:
--- Quote ---Mine ;ZZ4 cam , saimised base , stock runners ,plenum and TB , headers,Hi flow cat.13.1 / 102 in full street trim on street tyres, WHEN I get traction.
--- End quote ---
That is a quick time! Mine has 212/218 cam, ported heads, port matched intake, siamesed runners, headers, no cat, dual exh and I can only manage 13.6. traction down low is nil if launched over idle.
Vette Obsessed:
--- Quote ---Originally posted by 77CVT
--- Quote ---Mine ;ZZ4 cam , saimised base , stock runners ,plenum and TB , headers,Hi flow cat.13.1 / 102 in full street trim on street tyres, WHEN I get traction.
--- End quote ---
That is a quick time! Mine has 212/218 cam, ported heads, port matched intake, siamesed runners, headers, no cat, dual exh and I can only manage 13.6. traction down low is nil if launched over idle.
--- End quote ---
Further reinforcing the point of the traction issues these L98's have as it is...
Thunder Kiss:
--- Quote ---Originally posted by Vette Obsessed
Further reinforcing the point of the traction issues these L98's have as it is...
--- End quote ---
Anyone having traction problems should try a set (or pair) of these Yokohama A032R tyres. I have a set fitted to my 16" wheels and, unless cold, it's very difficult to break traction.
Here's a picture of them fitted to my car. Photo
87Z51:
" traction down low is nil if launched over idle."
My best 60ft times (1.84 on Falkens) have all been off idle launches.
Hold 800rpm on the line , floor it on the last yellow and flash the convertor (2200 stall ).Seems to dig in better.
However due to good 60ft times have destroyed new poly bush rear in 50 runs.Load on bottom camber arms when rear squats puts alot of strain on the bushes which will now fall out in your hand whereas they were a snug push in when new.
NB.For unknown reasons Falkens hook up better when hard.Used to run 20 -24 psi @1.90 - 1.95,
One night forgot to let air out and run best 60ft with 32psi of the strreet.Go figure
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version