98 Turbo Camaro track time.

[UR50SLO]

Got a call from my customer yesterday. His 17yr old son's car we'd put the Forward facing Headers on went to the track yesterday evening.
He left the street tires on it and did not leave with any boost. (ugh)

Last year before we did the turbo setup he wen to the track. His best time was a 15.50 (don't have the time slip in front of me for the mph) but that's what he'd said on the phone last night.

Here's the actual slip:From last night.
2.3699 60'
8.9931 1/8mi
82.55mph
13.7728 ET 1/4
102.56 mph
That's with 11psi on 92oct pump gas on regular radials.

We'd only had a chance to do a little street tuning here by my shop when we didn't have snow on the ground.

One night this week in the evenings we'll go out and do some more tuning and see where everything is at.
Not bad for a first time out and a 17yr old driver that didn't bring it up on boost to leave the line (obviously with a 2.3 60' time)
His entire reason for building this was to beat his brother's 70 nova with a small block in it. It ran 13.50-60 last night at the same mph. I think the Camaro would have had him with a good boost launch and proper tires :)
Anyhow.. thought I'd share.
~Scott

[UR50SLO]

Re: 98 Turbo Camaro track time.

Went out last night and tuned a bit.

I had changed some of the tables in the accl.enrich map to help with the stutter problem we had when we first drove it.
Later that day I'd asked if he ever changed the sparkplugs from stock.. and found that to be the problem.
I had not changed that table back after we found the spark plug problem... so... that was causing a rich tip in throttle condition.
It's corrected now.
His engine has too much movement (twist/torque) so we are going to install a limiting strap so it can't pull IC pipes off like it has been.
I use that on alot of vehicles where you can't buy poly or solid mounts or don't want to install either. The strap still allows for some movement and isolation of vibration.

He might be taking his son back to the track again tonight. I sure hope they use the 10.5inch slicks I gave them and boost lanuch. (Gave small lesson last night)
But it was on his radials and it just blew the tires off through till 3d gear.
I'll let you know what happens if anyone is interested.
~Scott

[StiLlsMoKiN875]

Re: 98 Turbo Camaro track time.

Awesome! Keep us posted!

[Shodown]

Re: 98 Turbo Camaro track time.

I sure hope they use the 10.5inch slicks I gave them and boost lanuch.

Stock stall converter on the car? If so, thats probably too much tire and he may dead hook...crappy launch. Tell him to fill those full of air and dont do long burnouts...

[UR50SLO]

Re: 98 Turbo Camaro track time.

It's got no problem building over 10lbs right away on the foot brake for launching even with the stock converter.
If you try to softly get into the gas while holding the foot brake and bring it up to just under 0 on the boost gauge (between vaccume/boost) and then floor it to lanuch it hooks for about 10ft and then blows the back tires off. (regular radials) on the Corvette wheels he's got on there.. 17's.. I think.
It'll make plenty of torque to get off the line with a 1.8 60'. That should be the slowest 60' the car should do with a good slick with as responsive as it is down low.
I'd proably break the trans or rearend if I drove it :)
I'll let you know if the weather here holds... It's possible showers this afternoon with T-storms tonight. :(
I might even go to the track if I have time..... I have a Typhoon coming over for tuning so it also depends on that.
~Scott

I forgot to mention he did 15passes that night at the track Lol... Kids :)

[ninety4three4]

Re: 98 Turbo Camaro track time.

what radials is he running? i think hed be better off with a little suspension work rather then throwing 10.5's on, i think thats going to spell disaster on the stock 7.5 posi unit, i just think 10.5 slicks are a little bit of overkill for the power level that you have the car at right now

[Shirl]

Re: 98 Turbo Camaro track time.

Easily a low 13 second car (or better). You should drive it!!! :)

[UR50SLO]

Re: 98 Turbo Camaro track time.

I've already warned them about the rear end being the weak link.... and since everything is basicly stock that they will just find the weaknesses in the drive line as it comes. He's ready to get a good 12bolt conversion rear end if this one fails. I think that'll be the first thing to break.
If he stick's with the 17" corvette wheels he needs a drag radial. Regular radials like are on it will not be boost lanuchable. If you like 60' times 2.0 or slower sure... bring it up to 0-1psi and then floor it. Automatic turbo cars have a huge advantage with a 10lb or better boost lanuch. There's no reason he can't get 1.8's out of it with no other changes but tires and proper launch coaching.
I'd like to see it run some 12.8-12.9 passes consistantly with 0 knock retard and good
60' times. Then we'll go from there. We got rained out friday so I'll try and go with them this coming friday and data record the passes.. maby put some more timing in it.
~Scott

[Turbo V6 Camaro]

Re: 98 Turbo Camaro track time.

the rear can take the abuse with the auto, until you start cutting 1.5 60's i would not worry about the rear end lol

what turbo is he running?

what kinda fueling and timing are you running?

[UR50SLO]

Re: 98 Turbo Camaro track time.

That'd be great if it'll take that kind of 60' times... I know all the V8 cars like his puke the rear end very quickly. (Several buddys with LS1/LT1) Cars.

I put a (TA49) Grand National turbo on the car. It's one step over a stock GN turbo.
Stock GN turbo supports 350hp flows 550cfm
TA49 supports 550hp and flows 800cfm.
Guys with gn's have run mid 11's with them with out giving up the spool time of a large turbo. It's a perfect street turbo for this car. Very responsive with enough flow and effecency not to nose dive on the top end.
I backed the timing off in the high load area starting at 3deg and ending up about 14-18deg (less than stock) on the timing table in HPtuners. We have no Knock retard right now. I'll edge back in the timing a degree at a time till I start to see knock.
The AFR's at WOT are 11.3-11.8 consistant through the gears.
I did reduce the shift times/RPM by 900rpm 1-2shift and 700RPM 2/3shift.
It seemed to take forever to shift with the stock RPM tables and made me nervice.
1-2 shift is 4800
2-3 shift is 5000
It takes another 3-500rpm to actually shift in reality so add that to the numbers to be accurate.
With the tune getting closer maby I can go up on shift RPM a hundered at a time till we find the limit of the stock valve springs with boost behind them. I think the cam will pull up to a higher RPM with boost but Again.. I like to take tuning slow. I also have to remember that a 17yr old kid drives this car daily and sometimes comon sense isn't there. If I had this car at 17 I'd already be in jail. :)
~Scott

[Shodown]

Re: 98 Turbo Camaro track time.

I know all the V8 cars like his puke the rear end very quickly. (Several buddys with LS1/LT1) Cars.

Thats also because they have TONS more bottom end torque than our cars ;) A 12 bolt for his car a lil overkill, a swapped Z28/TA rearend with LSD and 3.42's would be perfectly adequite. I've known plenty of V6 guys with those rears and have launched lots of 1.6-1.7 60's on nitrous/turbo and high stalls yet didnt break the rear.

Sounds like the car is really coming along nicely though :tup: Keep us updated.

[Turbo V6 Camaro]

Re: 98 Turbo Camaro track time.

That'd be great if it'll take that kind of 60' times... I know all the V8 cars like his puke the rear end very quickly. (Several buddys with LS1/LT1) Cars.

I put a (TA49) Grand National turbo on the car. It's one step over a stock GN turbo.
Stock GN turbo supports 350hp flows 550cfm
TA49 supports 550hp and flows 800cfm.
Guys with gn's have run mid 11's with them with out giving up the spool time of a large turbo. It's a perfect street turbo for this car. Very responsive with enough flow and effecency not to nose dive on the top end.
I backed the timing off in the high load area starting at 3deg and ending up about 14-18deg (less than stock) on the timing table in HPtuners. We have no Knock retard right now. I'll edge back in the timing a degree at a time till I start to see knock.
The AFR's at WOT are 11.3-11.8 consistant through the gears.
I did reduce the shift times/RPM by 900rpm 1-2shift and 700RPM 2/3shift.
It seemed to take forever to shift with the stock RPM tables and made me nervice.
1-2 shift is 4800
2-3 shift is 5000
It takes another 3-500rpm to actually shift in reality so add that to the numbers to be accurate.
With the tune getting closer maby I can go up on shift RPM a hundered at a time till we find the limit of the stock valve springs with boost behind them. I think the cam will pull up to a higher RPM with boost but Again.. I like to take tuning slow. I also have to remember that a 17yr old kid drives this car daily and sometimes comon sense isn't there. If I had this car at 17 I'd already be in jail. :)
~Scott

what plugs are you running in the car?

tune the car to shift by MPH and not RPM........ much better results.... set the WOT shift rpm to 4000 and use the WOT shift mph to shift the car...... it will stop that "hang" in most cases.

also if you up the boost to much more your going to need to upgrade the valve springs

[UR50SLO]

Re: 98 Turbo Camaro track time.

I'd not tried the MPH..... I'll give that a try. Thanks for the tip!
I attacked the RPM first and it seemed to do the trick. I'll look over the MPH charts and see what I can try and change there to help the situation.
Plugs: I'm trying to picture the number in my head.. Lol.. It's a A/C Delco plug.
We run a R43TS in the buicks.. I tried to get the same basic heat range as that with .32gap. It's one heat range colder... Like R42LTSM. I'll look in the morning and see what it is I've got extras at the shop.
I like to read the plugs to see if there's any difference between cyl. (air flow ballance) But this isn't my car.... I can only controll so much.
Thanks again for the trans tip.. I'll give that a try! :)
~Scott

[ninety4three4]

Re: 98 Turbo Camaro track time.

the rear can take the abuse with the auto, until you start cutting 1.5 60's i would not worry about the rear end lol

yea im used to stick cars, LT/LS and v6 so ive never seen a 10 bolt take more than a couple 5 grand DR launches and have anything left to them, an auto car is softer on the launch until you start getting into transbarkes but hes a little far from that still, lol good luck with the car!

[Turbo V6 Camaro]

Re: 98 Turbo Camaro track time.

I'd not tried the MPH..... I'll give that a try. Thanks for the tip!
I attacked the RPM first and it seemed to do the trick. I'll look over the MPH charts and see what I can try and change there to help the situation.
Plugs: I'm trying to picture the number in my head.. Lol.. It's a A/C Delco plug.
We run a R43TS in the buicks.. I tried to get the same basic heat range as that with .32gap. It's one heat range colder... Like R42LTSM. I'll look in the morning and see what it is I've got extras at the shop.
I like to read the plugs to see if there's any difference between cyl. (air flow ballance) But this isn't my car.... I can only controll so much.
Thanks again for the trans tip.. I'll give that a try! :)
~Scott

a few of us have moved to the NGK 3346 plug most can run 3-5* more timing on the same tune without knock