Holley systemax 2 + Vortech A trim?

Dave_mustang_50 · 12-04-2001, 04:52 PM

Is there anyone out there who has a similar combo? I`m looking for a few horses more and might pick up an a trim this week. Here are my concerns -
Will my 24pph injectors and pro m-77 work with say 5 lbs of boost?
Any input and/or advice is appreciated,
Thanks

Fostang · 12-04-2001, 05:14 PM

I'd go with some 30 pounders with a 80mm maf. Don't want to end up running lean with that much hp.

Rick 91GT · 12-05-2001, 08:46 AM

Dave, you may want to swap out that Holley cam though, it has a lot of overlap and will send some boost out the exhaust so you will see slightly less.

With those heads and intakes the A-trim may be too small even if you spin it up with some pullies, and I thought you wanted a ATI. The P1SC would give you room to grow as it will make more boost and flows a lot more air then a A-Trim and would give you some intercooling in that Florida heat if you get that option. I would go 36# injector or higher (42#) and not run the FMU, that 77mm is fine.

My dad runs a A-Trim on his 93 Cobra, extruded honed intakes, ported stock GT-40 heads, 2031, 83mm Pro-M, 36# injectors and he spins the A-trim 43,000rpms @ 5800rpm which really is over the efficency rating from Vortech which is 40,000 rpms impeller speed. He plans to step up to the T-trim since he really doesn't want to over spin the A-trim and it will feed more air.

Another thing to consider is if you go A-trim you don't get the boost a pump (T-Rex) ($150+) which you will need, or the boost retard ($200+) which you will need over 6psi to be safe, especially in the heat. The A-trim comes standard 6 rib, the S-trim is 8rib which is better for belt slippage issues.

I plan to get some spray this winter/spring because I can not afford the D1R intercooled set-up I really want with building a new house next year.

Dave_mustang_50 · 12-05-2001, 07:27 PM

Hey Rick, After I placed the post I got talking to Idle Wild and was told pretty much the same thing. The new idea is 36pph inj, new cam,msd ign. and an inline fuel pump. I`m looking at a paxton right now. My goal is to get one before Christmas and have it put on in March or so.
Thanks for the replys

12-04-2001, 04:52 PM	#1
Dave_mustang_50 Registered Member Join Date: Aug 1999 Location: New Port Richey, Florida Posts: 483	Holley systemax 2 + Vortech A trim? Is there anyone out there who has a similar combo? I`m looking for a few horses more and might pick up an a trim this week. Here are my concerns - Will my 24pph injectors and pro m-77 work with say 5 lbs of boost? Any input and/or advice is appreciated, Thanks __________________ 1969 Mach 1 351C with a c6(for now) Sold 92 Rag Top GT Procharged & intercooled DSS 331 LC Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot.

12-04-2001, 05:14 PM	#2
Fostang Registered Member Join Date: Feb 2001 Location: Stockton, Ca Posts: 599	I'd go with some 30 pounders with a 80mm maf. Don't want to end up running lean with that much hp. __________________ 67' Fastback-Supercharged 4.6 DOHC Cobra, T-56, 8.8 more to come. 67' Coupe-EFI, AOD, 8.8 90 Gt-Supercharged,MAF,TB,1.7's ripper, bassani x, 3.55's, 01' cobras, headers. 89'GT-Supercharged,Heads,Cam,Intake,TB,MAF,power pipe,headers,offroad exhaust,black bullits.

12-05-2001, 08:46 AM	#3
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	Dave, you may want to swap out that Holley cam though, it has a lot of overlap and will send some boost out the exhaust so you will see slightly less. With those heads and intakes the A-trim may be too small even if you spin it up with some pullies, and I thought you wanted a ATI. The P1SC would give you room to grow as it will make more boost and flows a lot more air then a A-Trim and would give you some intercooling in that Florida heat if you get that option. I would go 36# injector or higher (42#) and not run the FMU, that 77mm is fine. My dad runs a A-Trim on his 93 Cobra, extruded honed intakes, ported stock GT-40 heads, 2031, 83mm Pro-M, 36# injectors and he spins the A-trim 43,000rpms @ 5800rpm which really is over the efficency rating from Vortech which is 40,000 rpms impeller speed. He plans to step up to the T-trim since he really doesn't want to over spin the A-trim and it will feed more air. Another thing to consider is if you go A-trim you don't get the boost a pump (T-Rex) ($150+) which you will need, or the boost retard ($200+) which you will need over 6psi to be safe, especially in the heat. The A-trim comes standard 6 rib, the S-trim is 8rib which is better for belt slippage issues. I plan to get some spray this winter/spring because I can not afford the D1R intercooled set-up I really want with building a new house next year. __________________ *D/R 10108 NMRA Drag Radial, 25.5 chassis, F1R* *Check out RNH Performance Performance Engines and Custom Fabrication.* *From Mild to Wild we can build what you want, when you want it.* FOR SALE Stainless Steel Torque Box Supports

12-05-2001, 07:27 PM	#4
Dave_mustang_50 Registered Member Join Date: Aug 1999 Location: New Port Richey, Florida Posts: 483	Hey Rick, After I placed the post I got talking to Idle Wild and was told pretty much the same thing. The new idea is 36pph inj, new cam,msd ign. and an inline fuel pump. I`m looking at a paxton right now. My goal is to get one before Christmas and have it put on in March or so. Thanks for the replys __________________ 1969 Mach 1 351C with a c6(for now) Sold 92 Rag Top GT Procharged & intercooled DSS 331 LC Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot.

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