I went to the track yesterday and not content with my results. First pass was on 5-6 psi and it ran 7.34 @ 94 mph with solid hook of 1.66 leaving 3 psi. I then turned it up to 10 psi and ran 7.1 @ 99 not hooking and 7.01 @ 101 on 15 psi not hooking up even worse. However even without traction shouldn't it have more reaction to boost? I feel that converter acts way different on higher boost and actually feels slower. My question is how can I know if it is pushing through the converter and how to fix it. Right now it's a 3600 and launches at 3750 with low boost but flashes to 4700 on higher boost. It is a 9.5 PI triple disk and I need some ideas on what to restall it to.

 

What tire are the high hp trucks using to hook? I have tossed the idea of trying a 315 50 15 drag radial or going to biggest slick that I can fit. I live how DR ride on top end but I need to at least 60ft in the 1.5s again.

 

Imo...a 408ci with 91mm needs a very tight stall...
You gotta thing like this...your truck is 4000lbs and at 15psi you should be around 800rwhp or maybe even better... Most companies that build converters build them for cars (2k-3500lb)... I say keep the stall speed be make it tight! Explain to them you have a 1000hp,4500lb truck
As far as slicks/radials..they make all the difference in the word...but every truck,track,street is different....

 

I wonder the same thing. My converter is acting a lot different on higher boost now. It seems to only drop around 800RPMS but within .2-.3 time it's back to around a 400rpm difference and just hangs there till next gear change. This is in both second and 3rd gear so this isn't transmission slip, but converter related? I'm running a circle d triple disk, 3200-3400 stall.


I know it's changing though my first runs this year I had around 1k drop and the RPMS's only climbed as the speed climbed, not this hanging RPMs I see now.

 

Sounds like you are blowing thru the converter at higher boost.

 

You don't need that big of a converter for boosted turbo trucks. N/A applications maybe, but turbo's vehicles like smaller stalls' for the most part. There's a couple people that have gone 1.5's with stock stalls in their turbo rigs.

 

Are you locking it up in third? i know it wont really show up in the 8th tho...

I would get it tightend up,send mine with it when you do lol.

 

The converter used to be a 4000 and I dropped it to 3600 with significant improvement. I'm going to aim for 2800-3000 on the 3rd restall.

 

Why don't you get a boost controller. That way you can launch at low boost and then run at full boost when you reach a certain gear/rpm.

 

If he is blowing thru the converter, a boost controller will not help.