My SEMA DYNO PULL 1382 RWHP

[XJHEAD]

http://videos.streetfire.net/video/7...da004fbda6.htm

[Greg2]

That's nuts. Cool though! What is your engine/turbo combo?

[XJHEAD]

Originally Posted by Greg2

That's nuts. Cool though! What is your engine/turbo combo?

427W Dart Block
Eagle crank, rods
TFS-R hogged out
1-5/8" flipped headers to twin PT 78 GTS
Super Victor Intake EFI
80 MM Accufab
Custom I/C Bell core
Ed Curtis cam little guy, solid roller

Power is over at 6300 rpm's, still trying to figure that one out, been fighting it all summer???? Any input???????

[Collinsautomotive]

Nice power !

Got pictures of the setup ? I would assume one of 2 possabilitys. 1 your out of camshaft 2 you are out of cylinder head for the rpm your looking for with the CI.

Originally Posted by XJHEAD

427W Dart Block
Eagle crank, rods
TFS-R hogged out
1-5/8" flipped headers to twin PT 78 GTS
Super Victor Intake EFI
80 MM Accufab
Custom I/C Bell core
Ed Curtis cam little guy, solid roller

Power is over at 6300 rpm's, still trying to figure that one out, been fighting it all summer???? Any input???????

[MEAN_SBC]

Badass!

[Robert1320]

Very nice! Have any back pressure data?

[Collinsautomotive]

sure would be nice to have that. Although the best place to collect it is right at the exhuast port comming out of the head.

Originally Posted by Robert1320

Very nice! Have any back pressure data?

[XJHEAD]

I was having issues with back pressure when I had on-centers on it. I then changed over to tangs. We did a pull at 27 psi a few weeks back and only saw 30 psi on the guage. We were taking the measurement off the #8 port about 2" from the head.

My first set-up had on-center MP 60-1 908 rwhp @ 20 psi. HP went flat at 6000rpm's. Tried a pair of 74's on-center picked up 100 hp 6100 then flat. Once we see full boost it will not gain any more hp with rpm, some but not much. Even added 10* more duration in the cam and it only bumped it up maybe 100 rpm's. I have made a lot of changes this summer to get it where it is at everything helped a little bit but I feel I am missing something somewhere. Never did see a huge increase anywhere.
Changes
turbos
torque converter
valve springs
cam
on-center to tang
intake
downpipe to the rear went from 3" to 4"
by-passed I/C no change

[Collinsautomotive]

Hit me up via PM.

Originally Posted by XJHEAD

I was having issues with back pressure when I had on-centers on it. I then changed over to tangs. We did a pull at 27 psi a few weeks back and only saw 30 psi on the guage. We were taking the measurement off the #8 port about 2" from the head.

My first set-up had on-center MP 60-1 908 rwhp @ 20 psi. HP went flat at 6000rpm's. Tried a pair of 74's on-center picked up 100 hp 6100 then flat. Once we see full boost it will not gain any more hp with rpm, some but not much. Even added 10* more duration in the cam and it only bumped it up maybe 100 rpm's. I have made a lot of changes this summer to get it where it is at everything helped a little bit but I feel I am missing something somewhere. Never did see a huge increase anywhere.
Changes
turbos
torque converter
valve springs
cam
on-center to tang
intake
downpipe to the rear went from 3" to 4"
by-passed I/C no change

[R@mon]

what size turbine housings?

[XJHEAD]

Originally Posted by R@mon

what size turbine housings?

.96

[XJHEAD]

Here's a bunch of picts from the last couple of years, some are old most are recent
http://www.imagestation.com/album/pi...?id=2086775316

[thunderace31]

Im going to go on a lim here and give some advise baised on what I have learened playing with GN's

1st your turbin wheel plays a big roll in Back Presure, If your using a P - trim wheel your in for a lot of back presure any thing over 25psi of boost. For every PSI over 25 your going to add 5 psi back presure.

Now if you chage to a GTQ wheel you will not pick up any extra b/p do to the better design of the exaust wheel.

Also the Newturbos from turbonetics are suposed to be one step up from a GTQ wheel.

Your next issue can be the Heads what do they Flow?? If you cant move enough out you cant put any more in hence the Back presure issues again.

Example going from a stock GN head to a race ported version dropped back pressure and maid 90 more HP with just the better flow and the same turbo motor also spun up faster and maid power spun 500-600 RPM faster as well.

Next issue with back pressure Header size, At your hp level you should be running a 2" primary header so you can move the exaust out faster. This will hurt low end #'s but will most likly pick up as soon as you hit boost.

Turbos are tricky you cant just bolt them on and think there going to add tons of power and nt have issues. You have to find all the parts that work same as any engine combo.

Turbos just add more veriables that have to be addressed.

Hope this helps you some and Id try a better set of heads 1st or have yours ported a bunch more.

[JimmiSizzzle]

This stuff's cool and all; at least it isn't ricers; But just cause you can pay somebody the figure to build you a killer motor doesn't mean you can hook it, look at top fuel... The car with the most horsepower isn't always the first the stripe.

Not trying to take away from these guys awesome efforts, but I and alot of others don't give a shiite if someone can take a locomotive based powerplant convert it to hydrogen based fuel, boost it till it blows, and run it on dynamite, if it has no real world speed, or danger.

In other words this is like bragging about phucking a shemale from Thailand with a condom on... Yeah you got off; but so did the goat your dad was doin last night.

[XJHEAD]

Originally Posted by JimmiSizzzle

This stuff's cool and all; at least it isn't ricers; But just cause you can pay somebody the figure to build you a killer motor doesn't mean you can hook it, look at top fuel... The car with the most horsepower isn't always the first the stripe.

Not trying to take away from these guys awesome efforts, but I and alot of others don't give a shiite if someone can take a locomotive based powerplant convert it to hydrogen based fuel, boost it till it blows, and run it on dynamite, if it has no real world speed, or danger.

In other words this is like bragging about phucking a shemale from Thailand with a condom on... Yeah you got off; but so did the goat your dad was doin last night.

I wish I could afford to pay someone to put together what I have. If I could It would probally be putting down a hell of a lot more than what is is. When I qualified for the event in July I was putting down 986. Now if you were in the same situation. had a paid trip to SEMA and competing for the chance at $25,000 wouldn't you try to get some more power out of your set-up? How many races does it take to win $25,000????? I did pick up almost 400 horse between July and October with many countless hours in my shop and quite a few 140 mile one way trips to the dyno. Nothing like jacking up the car, putting it up on jacks and crawling underneath to drop a TH-400 on my chest rolling out from it then dragging it out because I don't have a lift. Yep, real fun and easy. Getting off from work at 7 or 8 going home for some chow say hi to the wife and kids then back to the shop until 2-3 and being back at work at 7 in the morning. Anyways most of the cars picked up 300+ from the time they qualified compared to the shootout. I am sure most will go back to the levels they had with the exception of a few. I know I will be dropping back down to 1,000 and try to get this thing to hook. We'll see what this 4,000 lb pig can do in the spring.
BTW, I looked at some of your last few posts, you seem like a huge contributor to this forum, keep up the good work...and thanx for the input...