383 dyno

[blownSS]

hi just got done with my fully built forged 383 9:1 compression with 180cc dart heads and a loid elliot cam and a d1 with a 10 lbs pullie. just wondering what kind of power u think it will make. also its a automatic

[blownSS]

getting it tunned this weekend

[Fastbird]

Completely spec everything out and we can give an educated guess. You gave some basicd but not a lot to base judgement off of.

[RealQuick]

hi just got done with my fully built forged 383 9:1 compression with 180cc dart heads and a loid elliot cam and a d1 with a 10 lbs pullie. just wondering what kind of power u think it will make. also its a automatic

575rwhp.

[blackbird1084]

Yes more specs needed. Is it a solid roller? What did the heads flow? Did you go fully forged? Also what intake and tb are you using? Size of your exhaust? And are you running stock manifolds or lt's with an x-pipe or ory?

[Paulster2]

I'm going to say somewhere between 100rwhp to 800rwhp :D Yes more info would be great.

[blownSS]

ran into some problems so havent got it tunned yet. its fully forged bottom end,ross racing pistons,scat crank and rods,9:1 compression, 1-3/4 long tube headers with 3 inch magnaflow exhaust , edelbrock intake manifold, 58mm bbk throttle body, hydraulic roller, water to air intercooler, stock mass airflow, 60# injectors, tr6 plugs gapped at 29, aeromotive fuel pressure regulator, 255 lph walbro with racetronics wire kit,

[Speed Inc.]

500ish

[Paulster2]

500ish
Won't the stock MAF beholding him back? I thought it was only good to about 450rwhp? Or does the forced air allow for more? Do most FI systems go sans MAF and run in speed density? Just wondering.

[blownSS]

thats the only thing thats still stock. i dont know what brands are good. so i didnt want to risk 300 bucks for a granatelly one. does anyone recomend any good mass airflows

[1FASTSS]

Won't the stock MAF beholding him back? I thought it was only good to about 450rwhp? Or does the forced air allow for more? Do most FI systems go sans MAF and run in speed density? Just wondering.

No, keep the stock MAf for tuning. The others are harder to tune. I even had to pull the maf ends and go back to stock!

[blownSS]

alright, good to know the stock maf will last a while. ill see if i finally post my numbers on monday if everything goes good with the tune.

[blownSS]

dam this car is getting me tired of all the crap. so im at the dyno and bank #1 is still lean took the manifold up and pluged up all the fitting extra good and nothing still the same. then they hook up the tech 2 scanner and cylinders 1,4,8,and,2 are all knocking bank 1 way more than the others. im at a point were i just dont know what to look for or do. i was told to do a compression test and a leak down. any more ideas would be good just not having fun with the car anymore, and loosing interest.

[CALL911]

You said you were running a 255 lph pump with a hot wire kit? For the power level your car is capable of, two 255 lph pumps would be required for safe operation IMO. Then, make sure you are getting good fuel pumps as many of the Walboro pumps out there are faulty (a story in its own, more in a sticky in the fuel section under my name). Racetronix fuel pumps are reliable.

That would be a start. The injectors are the right size for the application. This is assuming everything is working properly, which it may not. Troubleshooting can be very combersome! FI builds are filled with many extras that you just don't see in the N/A side. It requires extra patience, and in many cases, extra funds. The big thing is don't let it discourage you. Once you get it figured out and all dialed in, I promise it will be worth the wiat.

FWIW, given the parameters I am going to say around 530 RWHP once you get everything figured out and dialed in.

[blownSS]

just found out my mass airflow was bad this whole time. getting rid of the opti going with the 24x kit get the wire harness next week. so i should finally be getting it tuned

[CALL911]

^ It's a big undertaking. Good luck. Hopefully you have better luck than my buddies who attempted it (took them months and months to figure it out and get it working).

[blownSS]

thanks. do u know if they got the wire harness from efi or did they attempt to repin the original

[CALL911]

^ Don't know on that one. All I know is that for all the trouble they went through, and the time and effort spent figuring it out, it would be something I would never consider.

[RUNMYTA]

Ditto on the dual fuel pumps. I have almost the same setup as you. 385 w/D1SC (15psi) unported dart heads, etc.. I have a small cam 22x/23x on 114. I made 588rwhp/657rwtq thru an A4 w/PY3500 at 5600rpms.

I say you will make 500-520rwhp at 10psi.

[blownSS]

finally got it semy done i got 503hp 502 tq. but like everyone said i ran out of fuel at 5500 rpm. i got the mass airflow off and now its tuned as speed density. efi kit worked nice took me about half an hour to hook it all up and it fired the first time. looking at doing the dual walbro do u guys just have them both on all the time.

[CALL911]

finally got it semy done i got 503hp 502 tq. but like everyone said i ran out of fuel at 5500 rpm. i got the mass airflow off and now its tuned as speed density. efi kit worked nice took me about half an hour to hook it all up and it fired the first time. looking at doing the dual walbro do u guys just have them both on all the time.

Most guys (myself included) run the one pump full time, and have the 2nd fue pump boost referenced to kick on via a HOBBS switch. For example, mine kicks the 2nd fuel pump on when I achieve 4#'s of boost or more.

[blownSS]

if i get the hobbs switch would i connect the second relay to the original relay except for the ground that will go to the switch. or would it be a good idea to connect another switch that i can turn on and off so when i know im going to run the car the second pump would be on.

[blownSS]

got it all done now it was able to get 540hp 550 tq. at about 6200rpm

[NastyZ]

nice man! congrats!

[CALL911]

...FWIW, given the parameters I am going to say around 530 RWHP once you get everything figured out and dialed in.


got it all done now it was able to get 540hp 550 tq. at about 6200rpm

Hot damn! I was only 10 RWHP off! :finger:


Good numbers dude!

[blownSS]

yeah too bad it only lasted about three weeks. goign this weekend to get another dyno tune. this time with a 230 230 580 580 113 cam, ported dart heads and a bigger water to air intercooler. also have a 3k stall now what hp numbers do u guys think it will make. i might keep the same pulley on the blower to break the motor in if it makes enough boost, if not going smaller.

[blownSS]

ok got a stret tune to get the motor broken in. just want to know if im making 4.5 lbs off boost at 4500 rpm how much boost do u think it will make at 6k. just want to get a rough estimate so i can get a smaller pulley for the blower. any advise would be help full. or coments