LS engine with cable y1 trans takes me to no more than 110 mph in 5th gear at 6900 rpm.

My question is what should I do at the strip once im turbo I know I will be trapping over 110?

 

cant think of anything other than lsvtec

didnt want to have to do it lol oh well

 

bigger tire might help and raise the rev limit a little...if your going to be running slicks it should not be a problem

your not going to be trapping that much higher than 110 with just a stock ls turbo...maybe between 115 to 125 ish

 

Up the rev limit, bigger tires, or change the tranny's final drive... or a different tranny.

I have the same problem 8800 rpm in 4th gear and I hit the rev limiter. I'm gonna go to 24.5" slicks, I don't want to shift to 5th.

 

valve springs / retainers and tach higher in 4th if you have to... or go with the longer s1 cable ls trans.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tommyten &raquo;</TD></TR><TR><TD CLASS="quote">bigger tire might help and raise the rev limit a little...if your going to be running slicks it should not be a problem

your not going to be trapping that much higher than 110 with just a stock ls turbo...maybe between 115 to 125 ish</TD></TR></TABLE>

its gonna be around 350 whp in a crx

4th gear only takes me to 90 somthing mph

 

This is funny, i have a y1 but i don't have enough gear. I hit 98 mph in third. But i have a 9000 rpm limit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nevin &raquo;</TD></TR><TR><TD CLASS="quote">

its gonna be around 350 whp in a crx

4th gear only takes me to 90 somthing mph </TD></TR></TABLE>

Dude tach higher and get bigger tires to offset the gear ratio's ... my 4th goes to 143 so I dont have to shift into 5th with my slicks and race tune and I have the s1 cable ls trans... trust me it works

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20turboic &raquo;</TD></TR><TR><TD CLASS="quote">

Dude tach higher and get bigger tires to offset the gear ratio's ... my 4th goes to 143 so I dont have to shift into 5th with my slicks and race tune and I have the s1 cable ls trans... trust me it works </TD></TR></TABLE>

Yeah, Taller tires will help some but not much maybe a few MPH higher. Contrary to popular beleif the LS trans is STILL a good choice for us drag racers. I loved mine and will be going back to one w/ my new setup. Shifting to 5th sucks

Here is a Gear/speed calc. that is easy to use: Click Here.

Phil

 

if your still using those 20 inch slicks you did in the past then that's your problem...in 4th on 22 inch slicks what that tranny i end a little past 100...24.5s it shouldnt be a problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jockobo &raquo;</TD></TR><TR><TD CLASS="quote">if your still using those 20 inch slicks you did in the past then that's your problem...in 4th on 22 inch slicks what that tranny i end a little past 100...24.5s it shouldnt be a problem
</TD></TR></TABLE>

24.5's @ 6900rpm will still only take him to 110MPH. I had nowhere near 450whp and was trapping 120+ so, he's gonna need a tranny change and/or valvetrain upgrade.

Phil

 

i dont think this guys afraid of going into 5th...he says he ends at 110 in 5th gear...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jockobo &raquo;</TD></TR><TR><TD CLASS="quote">if your still using those 20 inch slicks you did in the past then that's your problem...in 4th on 22 inch slicks what that tranny i end a little past 100...24.5s it shouldnt be a problem </TD></TR></TABLE>

Who are you and how do you remember I had 20 in slicks? I haven't been to the track in FOREVER. lol

 

we use to race on thurdays when they had the heads up at kennadale...i had the 89 hatch with the single cam running mid 8s

 

i have the same porblem see if you guys can figure it out, i have a built single cam with 4.7 fd in my tranny and m&h 24.5 slicks in 4th im in the 8-8500 range right at the end but if i shift into 5th i doesn't pull anymore, im affrad if i drop to a smaller slick like a 22's i will hit redline alot quicker causeing me to have to shift into 5th.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jockobo &raquo;</TD></TR><TR><TD CLASS="quote">we use to race on thurdays when they had the heads up at kennadale...i had the 89 hatch with the single cam running mid 8s </TD></TR></TABLE>

oh ok yeah I remember. it was allways fun running you back then cause our cars were so even


I just went out and measured my street tires and they are 21-22inches tall. Last night I made a note of what each mph was for each gear was at 7k rpm and it goes like this:
1st@7k takes me to 30
2nd@7k takes me to 50
3rd@7k takes me to 70
4th@7k takes me to 90
5th@7k takes me to 110

ugh time for a lsvtec build

 

and that calulator thing is pretty dead on

Gear Speed @ 6950 RPM
1st 30.4
2nd 48.1
3rd 69.7
4th 89.5
5th 108.9
RPM in top gear at 80 mph: 5105