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How much of a restriction is a superram with forced induction? Currently running a 358 with fastburn heads, zz409 cam and a superram. Heads and intake base portet to 1206 size. Its a blast on the street but im ready to boost. . i have a set of factory stock 867 pontiac heads that will drop compression and flow waaay mote but im afraid the superram will choke it. I can go single plane but i think im gonna lose on the tq side, and its primarily a street/weekend toy. Whats the experts thoughts? Open to any suggestions
thanks
How much power you want to make? With a centri blower pulley’d right, it wont be that much of a restriction and can extend your rpm range if boost is increasing linearly with rpm
did a d1sc blower on a 383 tpi motor and it was making 530whp/550 wtq by 8 psi and like 4800-5000 rpm pulling to 6000. At 4000-4500 i think it made 7-8 psi and by 6000 was making 12 psi. I wouldnt call it a restriction really, it creates a different type of power band and plenty to risk your stock block imo
single plane may make alot more rpm and power up top and make less down low
I guess id want as much as feesable for the blower. Cog drive T trim with an air intercooler. Bottom end will take whatever I can toss at it. Id like to run my pontiac heads but theyre not gonna be a good match for the superram I believe.so maybe im better off keepin the fastburns and doin a piston swap.( currently 10.2:1)
I havent even explored injectors and a new cam yet either....
Those are raised runner heads right? Big port, i dont think they will match up to the base well. The base would restrict potential of that head some. If you want to use them you should look into a ported victor e efi single. Plenty of room to open up
you can do piston swap and go lower 9’s to 1. If goin pump gas. Do ring gaps to
My base has bean welded and machined to increase to match the same gasket size as those heads (1206) The intake ports were massaged on the fastburns to make the intake work. The pontiac heads could be had in raised or std runner. Mine are not raised oddly as most others ive seen were. I didnt think they would work that well, but it was a shot in the dark. I figured on a piston swap anyway. E85 is still a pain to find around here. I just figured the superram type build would give up some peak hp but probly be better for street driving
Its up to you. The pontiac heads could be made to work then. I dont recall what a T trim is rated at for hp but i dont think you’ll have issues maxing it out. Seems like belt slip is more of a concern than your intake manifold lol
Cog drive should solve any slip issues. Says 35psi max on the unit but im not sure on cfm.i remember nuffnuff losin quite a bit of tq goin single plane, but he was just on long runners before. He did gain big hp numbers though. I may try hoggin the superram to the max to find a middle ground.I guess worse case I can swap intake fairly easy after
Yeah single plane moves everything up higher in rpm for the most part. Superram with blower boost will be strong to 6500 rpm. Power curve will be fun no doubt. Big power from 4000-6000 for sure
Well, after diggin all weekend i think my best option is to step up to 2.02-1.60 in the fastburn valves, open the superram up as much as possible and drop compression to around 9:1 or so. I think around 13-14 psi ish should be pretty stout. Anyone have a cam/ injector suggestion or just rock the 409 ? I know the red tops arent gonna cut it.
