I agree with this.

We've relocated the IAT sensor to the elbow between the blower and the intake. I datalogged a couple of his runs and don't remember the IAT's getting out of control. Also don't remember IAT pulling timing.


The D60 rear with the quadrasteer is the biggest weight difference that I know of. But his truck is probably a few hundred pounds heavier. We're also comparing 325 cubes to 408 cubes, both at around 8-9 psi.

His best runs are 13.3's at 100 mph.

I agree the stock 76mm TB is likely holding him back. I'm still running my 76mm and in the low 12's, but only feeding 325 cubes. Not sure what would have to be done to get a larger TB on the Whipple.

If anyone knows more about this, post up! Thanks.

Any & all input is appreciated. It gets the thinking process started, helps me keep alll aspects of improvement in mind, instead of staying "tunnel visioned." It's why I started this thread.

Opening up the exhaust, without opening up the intake, may not be good enough. Any information (including pics) that you could give would be appreciated. Thanks alot!

I agree that this thing needs headers. Just ditching the cats made a huge difference. I don't have a timeslip to check for the 60', but I think it was in the 1.8's? I'll send him a text and then post up again. EDIT: 60's averaged 1.96

Thanks everybody, keep it coming!!

 

Im pretty sure I get what your sayin but,I think you may have have wrote it backwards.With that being said no matter what lowering your iat's will net some power.Which is what the mods I mentioned will do.When my truck was runinng wayyyyy back when (early 2010 lol).On a 70 degree day give or take iat's would rise no more then 25-30 degrees through a 0-130 pass at 11-12#'s.This is using the mods mentioned above.They will make a big difference if you push the blower hard enough.What size upper and lower pulley does your buddy have on his truck?

 

The guy who built the engine is also a friend. I just stole a couple pics off his FB account, haha!

The lower pulley is aftermarket, SFI, and larger than stock. I don't know the size though. The upper pulley is smaller than stock, and the only one he has for it. I don't know the size, and can't find a pic of it. I'm sure I could measure it next week sometime.

 

They have been averaging 1.96

 

Your friend needs headers and an intercooler and his truck will be a different animal. I would add a larger throttle body as well.

I was running around 12psi on my stock 6.0L with a 2.3 intercooled whipple and jba shorty headers and I was seeing 13.01 1/4 mile times out of my full size Denali.

 

I would try headers and meth first. Think taking a second look at the iat and timing on a full pass would be worthwhile. Further optimizations could include a larger intake track and a f/I spec cam.

 

Headers should be first thing. Can't get it in unless you get it out.

On a ford L boost went down and power went up just by increasing headers from 1.5 to 1 7/8.
Now that started at 24psi and went down to 21.
Slightly different then our trucks but you getvthe idea.

Meth and intercooler is only needed if there is a heat problem.

300lbs is a lot and very easy to be under estamated. And surely will not help the 60fts.

Just because it's a larger engine does not mean it's making that muchore power.
It always hard comparing trucks and set ups seeing how no combinations are the same.

Put a 150 shot on it and let the big dog eat.
That will wake it up.

 

Have you/has he noticed any valve float? Thats alot going on for a single spring, imo

 

There's your start"stock manifolds."

 

I agree with the headers. I also think the cam is way wrong for this many cubes, and a blower.

What options, if any, are there for getting a 90mm throttle body on this thing? Sincal, you mentioned something, can you give some more details?