Oh ok, I thought they changed to the more vertical bolts in '87, and for the MAP, can could I take any TPI unit and just take off the MAF stuff and add a MAP sensor to a vacuum port on the manifold? I was looking at this one on ebay ( http://cgi.ebay.com/ebaymotors/SB-Ch...item1e5feb944b ) and it says it has been modified to fit all bolt patterns and also it seems to be set up for MAP (I see a vacuum hose looking thing toward the back of the upper manifold, is that it?). Would this bee a good one to get?

Thanks,
Will

 

I did some more research and like you said, If I get a corvette tpi it will work with all heads and if I get an F body tpi it changed in '87 or at least thats what I gather from what markdtn saif here on the forum (I thought they all changed, I was wrong)! I think I may buy that one that is in the ebay sale I posted, let me know what you think.

Thanks,
Will

 

I'd pass on that ebay unit Will. It's got some ugly dents in the runners that can be difficult to remove. I'd also be leery of a unit that has been "modified to fit"(Bubba?)
Try your local craiglist, or check the C4 section of the Forum for an 88-91 unit
A unit from an 85-86 Camaro-Firebird-Corvette will work also, but there are no mount holes for the MAP sensor

 

Haha alright, I saw those dents but thought they had like a kit, and anyway, I'd probably upgrade to those upgrade runners they sell. And I think that modification is ligitimate, as it has to be drilled if it is a angle bolt type one ( to fit early style heads ). I found two others on ebay, maybe these are suitable, ( http://cgi.ebay.com/ebaymotors/tuned...item4aa688b9d5 ) or ( http://cgi.ebay.com/ebaymotors/CHEVR...item27b6bcbe85 ) and ( http://cgi.ebay.com/ebaymotors/1989-...item230bed678a ) They dont look or seem modified, nor do they have dents in the runners. Would these be good? The last one is an 89 vette one. Also, Would I be able to clear my stock fan and fan shroud with one of those bolt on K and N air filters?

Thanks for all of your help!

Will

 

Check out this link Will:

http://www.hotrodlane.cc/PDFFILES/TPIStory.pdf

Looked at the ebay links you posted. The first two, not enough info/pics, the last one(89 Vette) is not from a Vette(intake manifold is different, plus one bank of injectors is missing, but you might not want to use them anyway), but it'll work. According to the link I posted, 90 was the first year for MAP, looks like I was wrong:o, won't be the first time
A 90-91 plenum will have the bolt holes to mount the MAP bracket, but if this is not important(You can mount the MAP sensor anywhere as long as you have a vacuum source) then any of the Vette units will work, as well as the 85-86 units from the Camaro.
On my 68, I had the metal fan shroud, and the air filter will not clear it, either with the TPI or the LT1, so I used an electric fan from an early 90's Ford Taurus, it was actually pretty easy to install(compared to the rrest of the swap) but if you have the plastic shroud, I can't say if it will fit

 

 

Will, I have a complete TPI setup including GOOD injectors for 300 hp, that came off my car....i'ts all stock as a stove....but no t-body...you can get that off ebay easy....and no dizzy....you really do want the HEI for the TPI being computer controlled, and you want an electronic tach, them mechanical things are a nightmare...bluntly said, it was one of the first changes on my car 15 years ago....along with the TPI setup....a stock TPI will do your 300 hp easy.....these runners are not damaged, the stock silver set is clean, I have another set that are painted black.....the top mani was burgundy to match the car, back when.....I also have a set of 4 on the flange cast stock valve covers....burgundy paint now....that all will need cleaning

I also have you speed density MAP computer I know it's good, as tested on my car.....I even have extra cal packs....but I know the programing is not right for your setup....you can send it off to get it done for like 150 bux was last price I know of.....they do need your engine specs though.....they asking lots of questions, so be prepared....

you will need go closed loop.....

you will need some sending units, and a knock sensor....I have some of them hanging around but can't recall every silly part in the box these daze....been a while....

this TPI will fit a earlier iron head engine, so bolt angles dont count....

I do not have a fuel pump.....

15 years ago, I managed to make the conversion work perfect on my '72 vette here for a total cost of 750 bux, and THAT was with overpaying something fierce for a calpac at 250 bux.....

I had paid 350 for the TPI complete at Carlisle car show....

and yes, never put on a carb if you can do injection....

on my then stock Muncie 336 rear car, the Qj got 12 around town, and 15 or so on the freeway at 70......

I put on the TPI, and a while later drove to Florida and back, house hunting, area hunting...and got 24 mpg at 80 on I 95.........

but that was all winter '97, the car has been way more modified since then.....WAY more.....



if you interested or just want more info....email me....

mrvette72@concast.net

 

Alright, thanks for checking those out. I'm not really looking for a perfect unit (although that would be nice!) , and plan to fix whatever one I get up with some flow matched injectors, and as you said, I can just mount the MAP anywhere. So from what you said, I can use any 'vette years tpi, with the 90 to 91 units set up for MAP, and 85 to 86 of the camaro/firebird unit. Is that correct? I checked out that document you sent me and that was very informative, It really does a good job of summing it up.

Thanks again,
Will

 

I emailed you

Thanks,
Will

 

That's correct

Sounds like mrvette has what you need, and like he said you can pick up a throttle body from ebay, or check the C4 parts for sale section. Keep in mind you won't need the distributor if you go with the F.A.S.T. EZ set-up

 

Alright, I have so many possible routes to take at this point, I'm just trying to figure out which is best. I'll get back to you and everyone else tomorrow.

Thanks,
Will

 

Eh, this has been on my shelf for since forever....make me a offer I kant refuse......