JDM_Wrx

Hi,
looking to reverse inlet manifold on my93 wrx. i've done a quick search but alot has jargon i'm not familiar with. is it a simple case of turning it round and removing air-con or it is far more complex than that?

I've mailed David Wallis as i hear he sells modified inlet manifolds, but do i need a new one or can my original be used.

would appreciate if people who have done this, could give me some info.

Thanks
Rob

willfal

i dont think its as simple as just turning the thing around, i'm pretty sure that the inlet assembley is cut of one end and weilded back on the other. Bit of a job that i think...

Will

AlanG

The original can be used.

It's cut and re-welded cause the inlet would point upwards towards the front of the bonnet when you turn it round.
Here's a phaseII manifold fabricated to allow it to be used in the reverse position.

JDM_Wrx

would i need any extra pipes or extended throttle cable?

AlanG

Don't understand what you mean by "extra pipes".
If you're going to turn the manifold round , you must have an idea why you want to turn it round in the first place.
You don't need to do anything with the throttle cable. It can be re-routed okay.

JDM_Wrx

no, just a phrase. i was worried about throttle cable but all is clear now. looking to improve throttle response/ less lag by cutting down the pipework on fmic. do u have any pictures of brackets needed to relocate alternator?

cheers
rob

AlanG

There are various ways to do it.
This is what i did. Std aircon adjusting bracket welded to a plate.

AlanG

Phase I manifold is different to phase II, so pipework can be different as well.

Again, several ways to make pipework. Here's what i did with mine.
Some folks keep the pipework above the manifold, some route it underneath.

911

Stock fan belt Alan?
What's the tensioner off? Could you have used the A/C tensioner?
Graham.

AlanG

Not a stock fan belt Graham. All i did was run string round the pulleys to get the length i needed, then ordered up a 5 rib belt to suit.

The tensioner is a cambelt pulley. I couldn't use the A/C pulley as it didn't line up with my belt which uses the front section of the crank pulley. (A/C uses the rear i.e. nearest the block)
I dare say it could be done and probably has, i just used what bits i had lying around!

911

Thought as much as the A/C could be spaced back to re-align, but the cam roller looks good and presumably keeps things in place at 8000 rpm (ish)
Graham.

DIPSY

Alan G who did the alu welding on the inlet manifold .It would of looked better welded together with tig

AlanG

I initially had a problem with the belt jumping one rib on the crank pulley Graham.
When i fitted the PS pump and alternator, i lined up the pulleys *exactly* with the crank, but for some strange reason i always jumped a rib.

I put the PS pump and alternator back to the original positions, which, when checking with a straight edge and string, showed the belt to be out of line, but has worked perfectly since, with no undue wear on the belt and that is with some 6-7000 miles since it was done and at up to 8000rpm, though i don't venture that high too often cause my peak power is only at 5750rpm.

DIPSY.
Pavlo (Zen Performance) supplied the manifold.

scooby-woo

Alan Who supplied the spacer?

http://tinypic.com/jb7qfk.jpg

AlanG

The wedge part scooby-woo? Pavlo