I was looking at a 383 crate engine from pro formance, I was a little discouraged, here is what they told me when I mentioned the use of a Stealth Ram. Hey It’s Steve From Proformance Unlimited, We Will Be Happy To Help You With A 383 Chevy Engine. The Holley Stealth Ram EFI System I Would Not Use, Actually If You Going To Use This System We Will Not Build The Engine. We Have Tested This System And Proved It To Not Function Properly. It Destroyed 3 Engines In A Row And No Tuners In NJ Could Tam The System. You May Want To Look At The Mass-Flo EFI System This We Have Tested And Works With A 100% Success Rate. If You Have Any Questions Feel Free To Give Us A Call At XXX-XXXX Was it just a shameless plug for the Mass-Flo? I want to run a 383 up to maybe a 427 small block, with tuning, either PCMsForLess or dyno tune, wont a HSR support it just fine with properly sized injectors?

there are alot of people using the HSR, and many are getting good nbr. I wonder If they mean the intake itself or the EFI system. The holley commander 950 is an old system and maybe they dont have the skills to tune it.

Intake depend on heads/cam and where you want the power band. Then there are the victor jr efi intake for really high hp/rpm.

/N.

I am running a HSR on a supercharged 383 using Megasquirt to control the fuel. It works great for me and the tuning was pretty easy.
Do you know what they meant when they said the HSR destroyed three engines?

maybe what he is saying is he can't build good eng's kinda odd thing to say when so many people including my self have had this intake with out a problem. a piss poor tuner should still have even the idea to read plugs and know if it's running lean on a cyl. I would ask though since I am only guessing here

thats funny i've never saw an intake destroy an engine....just someone that didnt know what they were doing tuning it.

there trying to sell u the MASS-FLO system lol its horrible.... an intake doesnt destroy an engine.... u prob didnt kno wat they where doing when they built them and or droped a bolt or something in the cylinder. the intake just sucks air or air/fuel into the heads thats it. i think it would take a great deal of skill to destroy an engine through tuning.... but im sure it can be done. a stealth ram will flow enough to make 500hp 383 easily thats what im building right now
383 HSR ported
comp cams XFI280 cam 230/236 .567/.571 113 lobe
195cc patriot aluminum heads
30lb SVO injectors
58mm TB

you should forward that to holley would be kinda funny if the poor sap got sued for making up faulse story about a big company's product

Find an engine builder that knows what they're doing. Your money, your choice. Dont waste anymore time with those guys.

what is "Megasquirt"? I think I want to do a 383 settup for Supercharger using an Ati Procharger, what kind of power/times are you getting? What size injectors and heads are you using?

I have not been to the track yet so I have no times. I am using AFR 195 heads and 48 Lb/hr injectors. The injectors are actually too small for my setup. I max out the duty cycle at 80% around 5000 RPM and 5 lbs of boost running at 12:1 fuel at that point. The injectors are rated to support 550 HP on a forced induction engine at 80% duty cycle, so theoretically that is what my HP should be, but I have not dynoed it.
Megasquirt is a Digital fuel injection and spark controller. It is fully programmable through a laptop. You can find more information at www.diyautotune.com

To elaborate:

Megasquirt is a DIY fuel injection setup. You buy the board, and components, solder it together, and build a harness. Premade harnesses and kits are available if you dont feel up to the task of doing it yourself.
www.msefi.com is the forum for megasquirt
www.megamanual.com is the manual, used for assembly, wiring, and tuning.



I myself have a megasquirted TPI in my car. It was a very rewarding experience for me. It is a cool feeling to know that I ran every wire in the harness and every circuit in the car's "brain" myself.

It's THE INTAKE THAT ATE NEW JERSEY!!!



My take on it??

Thats bull... theyre just trying to sell you that thing. I however would go carbed



Please don't use any foul language.

I appologize for the incorrect link to megasquirt, it was not intentional. Toehead (or an administrator), can you please remove it from your reply.

All set...

The link was correct as of about 6 months ago.

That was an older domain, and the lease lapsed and some squatters jumped on it as soon as it expired.

yea i was gona say u where making way more than 550hp lol .... how are 48lbs injectors only good for 550hp!?! i got 30lb fords SVO that are good for 500-550hp and accel 36lbs are good for 500-550. 48lb should be good for a bit more id say 600-650.

I just ran the numbers using a brake specific fuel consumption of .65 (for forced induction) and a max duty cycle of 80%, and you are right, the injectors should support 700 HP, but I really don't think I'm making anywhere near that much power. I guess the only way to know for sure is to dyno it.

I don't know man, if all the tuners in New Jersey, I mean every single ONE of them couldn't tam that system then it's just un tam able and that's all there is to it. That system is actually on the FBI's 10 most wanted list, it went on a killing spree leaving sbc's dead across the East coast!

I use the 165 ECM with my HSR on a 406, it has gone 116MPH / 2.2 sixty foot,,, with a slipping clutch and PCMforless tuned it.

What is a 165 ECM? So did PCMforless get it right the first time? I found a 396 small block on CNC motorsports that looks like a great deal, I was thinking about getting it and slapping a Stealth Ram on it, and having PCMforless tune it. I would love to get it dyno tuned, but I all the shops I have emailed only do LT1 and newer cars. Anyone know if a shop I can get my HSR dynotuned at in the Fort Hood Texas area? I could go as far as Houston, or Dallas also. Thanks for all the responses.

could there be air distribution problems with the HSR? my headers seemed to be whiter in front two cylinders than the rear but all exhaust valves and plugs were white from being too lean to begin with.

seems like the back cylinders will get the most air since the front cylinders' intake port opening are right below the TB and the air would "skip" over them.

I know the miniram was said to have similar problems. possible lean condition on one or two cylinders that didnt show up in tuning/wideband could destroy a motor

BUT it does sound liek a marketing scheme for the mass flo or w/e

I talked with local engine builder while ago.He told me that he is noticed similar problem with HSR.

idk i think ur pushing around 600hp with your forced 383, i mean im prob gona be puttin 480 down with my natural 383 HSR, so u figure 40% increase with a supercharger then really they give 45-55% increases and at 10psi im thinking 50% with yours.

40% of 480 is 200hp so id be puttin 650-680 at the motor and im goin wit prob 6-8psi with my calcualtions so at 10psi im hoping for at least that.

LD85... 2.2 sixty foot!?! u better start upgrading ur suspension but i can see that with the slipping clutch... thats why u go auto

i never heard of the HSR and the leaning out probs? wouldnt this happen to all intakes like the HSR, LT1, miniram basically anything set up with runners setup infront of the other? even the TPI i would think would have the prob too since the whole pass side is before the driver side.

some one should machin the TB onto the side of the HSR right between the 2 groups of runners and block off the front.... hmmmm

TPI supposedly has this problem especially with the NOS nitrous kit, it is said that it sprays the nitrous past the first 2 intake openings in the plenum. I wouldn't worry about it, if you tune the thing to run on the safe side at WOT then you shouldn't have an issue. It's not like a big hose of air running into the engine, the ports will pulse on and off when the valves open. There may be some additional turbulence at the front from the incoming air but air will still get to the front 2 ports.

480 at the wheels in a n/a 383 is very stout, i dont see the HSR flowing enough for that.

165 ECM is the factory stock 86-89 Vette ecm.

They go it dead nuts by the 3rd try, I would drive the car and do a 20 minute data log that would include 1 WOT, then email the log to them and they would send me a file that I would burn onto a chip using a Moates adapter

nooooo 480-500 at the crank lol, im hoping for 400 at the wheels. but i will def be getting 480 at the wheels with 10lbs of boost

oh got yah! that could work out

This is a quote from a guy over at holley I had some contact with.

"I do know they have some distribution issues on the N/A applications but not enough to worry about.

I dynoed the Stealthram Vortec the other day with 8 widebands, non-adder, and at WOT the A/F was within .5 on every cylinder. Looked very good."

/N.