Those of you with gen 2's and Cobra intakes (you two know who you are lol), what kind of timing are you seeing at WOT throughout the rpm range? I think I may have found my issue with why I have no low end torque...
Gen 2 timing with Cobra intake
- Thread starter 98LSC32V
- Start date
Sapperfire
Dedicated LVC Member
Did you delete the IMRCs?
More air volume will decrease torque, but increase top end HP.
Combat this via higher stall and gears
More air volume will decrease torque, but increase top end HP.
Combat this via higher stall and gears
Yes I have MMR Billet IMRC deletes and 4.30 gears. But I think my timing is way too conservative for NA, i'm only seeing 20 degrees at WOT. I datalogged with the Torque app for Android.
Sapperfire
Dedicated LVC Member
I'd go for a taller stall. How's your tune? egr?
I have a custom Sniper tune that's adjusted for the Cobra intake, deleted EGR, etc. I think I have the same timing from my nitrous tune however. I ideally would want a stall but I just ordered a 3200 stall for my GTO so my priority is that car at this point.
Sapperfire
Dedicated LVC Member
When you say "no low end torque" can you not do a burnout or what?
I'm just chasing down the same issues as you, thou my project isn't finished yet
I'm just chasing down the same issues as you, thou my project isn't finished yet
Sapperfire
Dedicated LVC Member
Jmod and shift tune?
KStromberg
Dedicated LVC Member
I have no idea what my timing values are at. I have a mail order tune and the tuner did nothing to change the tune except for about a 5% change in the shift schedule when going from 4.10s to 4.30s
I think you are leaving a lot on the plate for launching without a stall. Also, the IMRC deletes are hurting you without a stall.
I'm telling you dude, put a 3800 stall in your car and see what I mean. Your car will perform A LOT better.
I think you are leaving a lot on the plate for launching without a stall. Also, the IMRC deletes are hurting you without a stall.
I'm telling you dude, put a 3800 stall in your car and see what I mean. Your car will perform A LOT better.
chris2523
93 Mark VIII
19s are heavy..
Don Pfau
Dedicated LVC Member
+1 I have my IMRC and a 3,800 stall and wanted more. We just upped it to 4,200. And I agree with chris2523 you need lighter tires and wheels. At least to drag race. I'm even considering a set of stock 16" snow flakes with M/T Street ET Bias Ply 28x11.5-17. Being N/A I'd go with the 26X10.5-16. I would need the taller ones to keep the rpm acceptable at the end at over 120 mph.
DLF
Dedicated LVC Member
There are IMRC timing tables that have to be manually added to the base timing table when the IMRC's are deleted.
@ WOT I see 27.75 degrees in my logs from 5K to 6.8K RPM's. 22.75 degrees @ 3K and 26 degrees @ 4K, also @ WOT.
There are also adjustments that need to be made in the tune so that the knock sensors can add timing if the motor and fuel will tolerate it.
@ WOT I see 27.75 degrees in my logs from 5K to 6.8K RPM's. 22.75 degrees @ 3K and 26 degrees @ 4K, also @ WOT.
There are also adjustments that need to be made in the tune so that the knock sensors can add timing if the motor and fuel will tolerate it.
Im going to hit 13's NA with proper timing on the 19's in the fall/winter with the stock stall. Thats good enough for me as the gto is my fast car. Your stall speed depends on how much power your motor is making as well. In one car a 3000 stall converter could flash to exactly 3000, take that same stall and in a different car it could stall like 3400you because it makes more torque...
Don Pfau
Dedicated LVC Member
Well good luck to ya. I'm glad DLF knew the timing table. I thought 20 deg at WOT was low. That should help.
KStromberg
Dedicated LVC Member
That would be commendable. I'm fairly certain no NA Mark VIII with a stock converter and 19" wheels has done it.
That would be commendable. I'm fairly certain no NA Mark VIII with a stock converter and 19" wheels has done it.
Well considering I ran 14.1 on a conservative nitrous tune in the hot summer I think I should be able to pull it off in the fall/winter with a nice NA retune.
KStromberg
Dedicated LVC Member
I suppose. I ran my 14.1 in 2010 short-shifting at 6100 and 6300 rpms.
KStromberg
Dedicated LVC Member
OH! And that was on STOCK intake too if that gives you an idea what a stall converter is worth with a less than optimal setup.
OH! And that was on STOCK intake too if that gives you an idea what a stall converter is worth with a less than optimal setup.
I ran 14.0 with the stock intake and an all motor tune.