The reason im asking is because my car builds boost fine all the way up to about 14#s@5800 rpms and then it plains out. The belts not slipping and ive checked for kinked hoses. I have the MAF on the suction side of the blower and im starting to think that maybe thats the restriction. I have a huge filter with 4" metal tubing except for the orange dryer hose so it cant be collapsing.

 

I have a 15# pulley on an AFR ported 190, 383 motor.

Most I have seen is 13.4 # at about 6100.

 

I have the same problem as you described. My car made 14 psi (ATI F1) and made 705 rwhp. I think the biggest restriciton was my twin intercoolers. I am planning on going with a front mount intercooler this winter. My car flatened out at 14 psi also. The only reasons that would happen are:

1. Too small of a filter
2. Collapsing orange flex hose
3. Belt slippage
4. Intercoolers too small.

 

Shawn,
Did you fix most of the issues with your car?
How is it running now?

Thx,
Claude

 

Yes, im thinking it may be that also. Im also planning a front mount because thats what I had on there before. I just put the twins on temporarily because they came with the kit.

Anybody looking to buy a twin IC setup

 

I ran 18 psi on my twin intercoolers. But I have no Flex hose., so I don't think the intercoolers are the problem.

 

cj, I'm interested in the twins if your selling them. How much? Email me at BaOdysseus@aol.com

 

There's another guy on this board that is running a D1 with twin Intercoolers making a lot of power as well, I know it's over 15+ pounds. He goes by the name Sean94Z. Sean is pretty busy getting married tomorrow so I dont think he will be checking out this board till after the honeymoon but you can do a search and find his name and check out his set up. I do know that he does have a hard intake tube as well with a big filter.

Thx,
Claude

BTW...If you do see this Sean, Congrats and hope everything goes GREAT!

 

One step forward , two steps back.

I went with the FAST, 75# injectors and the dual intank pump. All that went great and fuel is no longer an issue.

But for whatever reason, the rings did not seat with the last motor refreash and the car burns oil BADLY. I said screw it, I'm going to drive it for the summer and pull the motor again in Oct. As a result I have peroblems associated with burning oil such as fouled plugs.

The tuning is not TOO bad but not perfect. I have played around a lot and although WOT and moderate exceleration is fine, is it driveability that is at issue.

In summary, I have as many things to do this year as I did last year but given the need to pull the motor again, I have decided to leave most of them for now - vacuum pump, solid intake, re-plumb the surge valve into the intake side.

I only went to the track once and was only the second time I had been on drags. I also NOW know that the performance was restricted due to fouled plugs. Best numbers were a 1.99 60 foot and best time was 12.30 and best ET 123.

Only went to the dyno once, right after the drag day to find hp was 480 @ 4500 rpm and then just plummeted down. Given AFR, fuel and tune appeared to be fine I at first thought of ignition. I pulled the plugs to find they were BLACK. Burning about 1 litre of oil every 400 miles. *ugh*

Not sure why the rings did not seat. Given the car burned oil from the start and given the car was lean, not rich in the early days, I suspect builder error.

PS: Sorry to hi-jack the thread.

 

My setup currently has a solid piece inlet pipe, larger K&N filter and a SD concepts spring loaded tensioner. I still think the problem occurs from the intercoolers being too small.

 

Sorry to hear that broh.

When you orignally started up the car with new motor did you have a decent tune I have heard of a few folks washing the rings with an overly rich tune at start up.
Also did you break the motor in with Dyno Oil and was the motor primed before you started it?
Do you happen to know where they gapped your rings at?

I am not sure what could have caused your problem but these may be some of the few things you wanna check or do in October (if it was not done in your first rebuild).

Thx and Good Luck Broh.
Claude

 

You guys hitting high boost #s have you relocated your MAF to the compression side? I think im going to try that to see if it helps any.

 

CJ,

I have a setup similar to your old p600B setup and was wondering if there was a big increase in performance from you p600 to the D1? I'm asking because i'm considering moving up to the D1.

Are you gonna run a shot on it still?

Thanks
Travis

 

I have owned both blowers and all I can say is that the D1 is a huge improvement over the P600B.