96+ Intake/throttle body on 91-93 LQ1

[Mach10]

For starters, I'm not horribly concerned about the flow capacity of the 91-93 intake, as it seems to suit my purpose quite well.

However, I much prefer the idea of a removeable throttle body for a number of reasons; foremost being that my 200k LQ1 is starting to get a little slop in the throttle plate. Rather than spend too much time fixing it, I'd rather get the newer unit. Also, since the rest of the motor is being massaged, I like the idea of boring out that throttle body and getting a wider throttleplate for it. Again, easier on the newer unit.

That said, I should state that I'm still running the 92 EFI setup. It's been stripped down, and all the emmissions controls removed. All I basically need is the TPS, MAP, and IAC on the system. The MAP I can relocate (being in a Fiero).

Can anyone point me in a good direction for what's involved in the swap? I haven't held both intakes to be able to compare the two. I know there are some heater line differences, but these will be negligeable since I'm not running it even remotely like factory. I'm more concerned with getting it to bolt up and seal, and still having my IAC work (I've read somewhere that the 96 TPS is much the same as the 91-93).

[z34phoenix]

dont quote me on it, but to grab the 96+ intakes, i think you will need 96+ heads.. i know for a fact that the exhaust manifolds are different and wont bolt up. as for boring out a TB you can only take the 96+ intake so far before it gets brittle and very thin around the throtle plate...( see other post in forum i just P&P / bored my 96 tb) RSMracing sells a new upper manifold for your engine. it has the larger TB. that might be an option, cause doing a swap would cost more then just buying thier specificly made intake. good luck!

[Mach10]

I've heard of it being done, I just haven't had both units in my hand. I know that the upper intake doesn't bolt at ALL to the heads, (except for a couple of support bushings on the rear head) but to the lower intake. If the 91-93 lower intake can be modified to take the 96+ upper, it should be quite feasible. Like I said, I've heard of it being done... I could be totally wrong of course, but if I was sure, I'd just buy the intake off the hop and go from there.

As for boring out the throttle, I'm not as concerned about the throttle plate as I am about the transition to the plenum right behind it. As long as I can maintain a good 4mm or so of material, it should hold up just fine with the silicone couplers I'm using for the free-floating CAI. There won't be a lot of stress on it. Besides which, I can open up the transition by chopping into the manifold itself, and raising the shelf right behind the throttle-body. I'll sacrifice a little low-end torque by increasing plenum volume in order to increase air velocity into the plenum.

[fieromadman]

You dont need the 96-97 heads to run the 96-97 intakes. You just need to have the upper and lower intakes, TB arm, TB and rear valve cover (left side). Then you will need different lines for the PCV and etc. but it shouldnt be a big deal since some of that stuf you arnt using anyhow, it is possibly better to just go with breather filters instead of the lines that connect to the intake anyhow. That way you wont get oil and stuff in the intake. The only thing that I would be worried about if I were you is getting all of the parts. Its much easier to snag a complete core engine than to try and get all of the parts seperate (believe me I am going through this right now). There used to be a write-up on the 96-97 intake swap, but im not too sure that it exists on this site now since they have re-done it which really kinda sucks because I had wnated to use it when it finally comes time to do my intake swap.

[bszopi]

http://60degreev6.com/discussion/kb.php?mode=article&k=73

It needs some formatting so that its easier to read/follow, but it'll serve its purpose now. I was starting to think you guys were smoking something about this existing! Ended up being posted in the NEWS area of the old site, not the DOHC articles, so I had to search the forums trying to find the old link. But its all good now...

Enjoy!

[Mach10]

Well, that's the article on how to swap a complete 96+ motor into a pre 95 car.

Looks like the intake ports are about the same on both, so I'll just go ahead and buy the top half of a junk motor. Thanks for the help, guys. I'll document what needs to be done since nobody here can seem to find the right article (I'm POSITIVE I'd seen it before though... )

[z34phoenix]

if you find it a junk yard. let some of us know. i know i would like ot land a 96 or even 97 PCM from a DOHC people always want the exhaust manifolds for turbo projects. somone wanted the heads to practace P&P so just drop the forum a line if you find an intact car with these parts

[dohcfiend]

http://60degreev6.com/discussion/kb.php?mode=article&k=73

It needs some formatting so that its easier to read/follow

WHAT!!?? i didn't think my guide was hard to follow. get with me and lmk what u think could be done better.

what do u want to know about the intake swap??

also the article mach10 is referring to was made by oldskoolgp if i am not mistaken.

but if u read mine, it should cover about everything u need. but oldskool's is focused on just the intake where i covered everything.

if u read both of them you'll be twice as likely to g figure it out.

96+intake do bolt to 91-95 heads.

[bszopi]

Ok, I found the other one...

http://60degreev6.com/discussion/kb.php?mode=article&k=74

The picture links don't work yet cause I don't really have the ability (or time) to do what is necessary here at work. I can do it as soon as I get home tonight though.

As far as the engine swap one needing formatting, I was mainly meaning making the section names bold or a different color, etc, just so that all the text just doesn't run together.

[fieromadman]

http://60degreev6.com/discussion/kb....e=article&k=74 Was the aritcle that I was looking to get posted. Thanks for finishing that up!

-Jeff

[qwikgta]

some, not all, the parts are for sale on ebay at this location.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=8038048586&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1

again, not all the parts but a good start.

RJ

[Mach10]

Yeesh! I'd forgotten how ugly the 95+ manifolds were


I'll say this for the 91-94... The one-peice cast intake is much sexier looking. I'll be hitting the 'yards soon looking for a complete bit. If I find one, were there specific parts people needed?