Turboing my GS-R b18c... i have a chance to get ahold of A/C compatible ramhorns for a cheap price but i do not plan on running a/c in my car once the build is done....i guess my question is is there any disadvantages to running a/c compatible ramhorns in comparisson to non a/c compatibles?

Thanks for your help
Josh

 

Nope, if made correctly the only real difference is flange placement and angle

 

I have a full race stage2 kit with an AC ramhorn. If you aren't going to use AC then DO NOT get that manifold.

The issue on these manifolds and our engines is that he compressor side is facing the radiator and in an angle at that. I have a gt3076r with 4" anti surge inlet. There is no way you can fit a filter directly on the turbo and I barely got a 4" intake on there. My local shop took two 45 bends of aluminum and made a "S" shaped peice that put my filter in the top left corner of the radiator just in front of the charge pipe. It's a tight fit to say the least... I'm actually thinking about getting a compressor housing with a smaller inlet so that I can run a smaller diameter charge pipe/filter. The reason for this is so I can run a thicker fan motor. Currently my intake is touching the back of my SPAL 11" slim fan.

If you go non AC the compressor is facing the driver side. You will have room for any filter, IATs will be lower because you aren't sucking in hot radiator air, and if you want to run longer turbo's like borg warner's then you won't mind the compressor inlet sticking out a few more inches. A borg EFR turbo would probably be hitting my PWR radiator.

I love having AC in my car don't get me wrong but if I wasn't going to use it I sure as hell would have sold this manifold and went with a non-ac one.

 

Were u using a full sized radiator?..cause I plan on using a half sized...idk if that will make a difference

 

Plus I'm using a Garrett gt3037r which is basically the same exact turbo as the 76r

 

I run a PWR half sized radiator.

A full size single core (stock sized) radiator will almost fit but the wastegate would probably hit it when the engine moves under hard pulls.

 

mine has a 4 inch intake with a 4 inch aluminum velocity stack and the filter sits behind the headlight... 6265 precision turbo.... it just takes a little fab work to get everything perfect...

 

DelSolMarine, can you post pics of your setup. Is this on an integra or del Sol chassis? Who made your manifold? What type of radiator/fan are you using?

The reason I'm curious is that I need to run a larger fan to deal with ECTs in the 90F+ days. The picture above doesn't really show how little room there is to work with.

I was seriously thinking about changing compressor covers to one with a 3" inlet so I could use 3" pipe. I could use that extra inch of space for the larger motor on the SPAL medium sized fans.

 

i see the flange for the turbo is at a pretty serious angle the ones im looking into are strait and the only thing similar is the extended wastegate tube...would that mean these ones im looking into are non a/c compatible?...if so thatll make me even happier seein how this guy im getting them from has no clue weather they are or not and thats how i talked him down to such a low price

 

its a 4 inch aluminum intake and i am running a 13" spal pusher fan w/ relay... 188 degrees ECTs

this is the peakboost ac manifold and i have had it for 4 years with no problems.... i have 9psi spring in there and it creeps to 13psi... if i had a tial 60 instead of the 44mm on there it would not do this... but for the size turbo i have its all good! it held 30psi of boost on the dyno strong

 

Thanks for posting the pics. On an integra chassis I can't fit 4" piping between the charge pipe and headlight. Even if I could the ABS would be in the way of the filter.

The peakboost flange doesn't seem to put the turbo at the angle my FR does. That's one less headache. I've got a .6bar V44 installed and it holds 9psi so surprisingly no creep.

So you have a AC manifold but no AC? I'll have to look again but I don't think I can get a 13" SPAL pusher fan installed because of the condensor.

 

the ac just is not installed yet...

you would be surprised how you can get things to fit with custom work...

you also dont need to put in a gigantic filter like mine lol

 

What makes a manifold not power steering compatible ?

 

If you look at my pictures you can see where we had to cut the PS bracket. I can't recall any ramhorns that weren't PS compatible. You usually see that problem with top mounts.

 

top mount is best
ramhorn no A/C 2nd
ramhorn A/C compatible 3rd

It is sometimes a byatch to work on the ramhorn A/C compatible manifold setups. Like removing dp, oil lines, etc. Top mount makes it much easier and non A/C ramhorn is pretty easy to work on. Performance is basically the same on all give or take.

 

what size downpipes are you guys running can a 3 inch downpipe fit so it wont hit the a/c compressor? can you guys post some pictures underneath im about to switch to a ramhorn with a/c soon im just doing my research now.