I’ve done allot of reading and some how I can not find an intake manifold that gives me the most power between 2.5k-7k. The edelbrock and skunk2’s make power in 7k-10k. Horribly useless for my application. The closest I can find is the PerformerX from edelbrock, that makes power in 3k-7k. Which is just about perfect but they do not make an application for a b18a motor. Go figure.
So my goals being stated, has anyone seen any legitimate dyno’d power gains on a b18a motor with the short runners? Such as the skunk2 or edelbrock?
Also any luck with the BLOX intake, with longer runners hitting power in the lower rpms also. I couldn’t find any data on thier power band.
Thats my dilema. I would appreciate any info and feedback on these intakes and what my best route would be to go.
I just have:
Intake
Cams&gears(pr4’s for now until i decide if turbo is all its cracked up to be)
2.25" exhaust/header
safcII
msd ignition (was futily diagnosing an idle issue and just replaced it thinking i might go forced induction in the winter while its stored)
they dont make for a b 18??? i dont believe that. i hope you know that the b manifolds are all the same, except for the gs-r one. and again. i dont believe that. and what about the msd???
No, they are NOT the same. the b16/b18c manifolds have a different bolt pattern and water jacket end; you have to cut off the waterjacket and redrill two holes to get a b16/b18c manifold to fit a LS properly. Hell, it is easier to fit a b16 manifold to an A20 series engine; I know, I did it.
to the original post: skunk2 pro series is in that range high range, yes, but the standard one is not. If you want an ITR-style manifold for cheap, get the BLOX manifold for the LS; they usually can be had on Ebay for a couple hundred bucks, and fits the engine.
Okay, so basically this has helped a bit. I do know gsr manifolds won’t bolt to ls heads. Thats a pretty duuuuh thing ya know. I think you mistakenly thought I wanted a 94+LS manifold, and yes i know those bolt up.
As far as the MSD, I was just stating it was replaced and upgraded during a diagnosis process. I am fully aware that the stock honda ignition is capable of producing enough spark for an NA motor. But as I stated. I have a turbo sitting around. And I might just peice something together this winter, so I would probably have had to buy the msd ignition regardless.
What I am looking for a is a manifold that has a powerband of 3k-7k.
NOT 7K-10K. Which edelbrock, skunk2, and obx are all short runners, making power in higher rpms.
The blox manifold appears to have some longer runners that should if it follows through with typical manifold design, will produce power at a lower rpm range. Instead of concentrating power in the high rpms, where I will never be (unless I miss a shift or whatever), it should make power in low rpms. Maybe I will email BLOX and ask where the power is made in thier intake manifold.
Did we not cover I have an LS head. Kind of hard to bolt a gsr intake onto it. And correct me if i’m wrong, I have a p30 intake atm on it. Porting that one out won’t help that much. Back in the v8 world we never saw big gains from stock ported intakes. The big gains came when we got in an edelbrock intake and ported the heck out of that.
Soooo out of all the thousands of people running an LS motor on these forums, NO ONE apparenetly can answer my question and provide a decent explanation why I should take that route.
Why is it none of my technical questions ever get answered ( and I provide more than enough info), and I could ask a lame ass ‘carbon fiber’ question and that gets friggen 30 replies in an hour. Are we all show and no go here or what?
sorry, i didnt know JG had an intake for b18a’s so i just thought you meant b18c or b16 head
anyways… in your case. p30 will not work on your car because its for a b16. infact stock for a 2nd gen b16. but there are alot of 2.0L and vtec guys who will swear a p30 intake makes more power before 8000 than any other aftermarket or ITR. not including the AEBS
in any case, you might want to consider a newer 94+ LS intake manifold. the stock one. If you check the b20 threads, you notice everyone reccomends this intake manifold if you cannot afford the skunk2. honestly, i dont know how much porting would help… but i know if you were to modify a 94+ intake manifold to flow the same air a BLOX or skunk2 intake could… you’d have better air velocity on top of that since the runners are longer, but you loose out in plenum size. and there are alot of guys out there porting ITR intake manifolds to the point they are almsot paper thin and getting really good gains.
i would go for the blox IM check HT seems to be a good piece some say its better the sk2. get a blox and pnp that, I dont know what your future plans, but if i were you id save my money for turbo and see what your bottlenecks are then. yes a 94 IM will help you a little but the gains from a IM are minumal in your application as is on stock cams.