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7a rebuild and Vortech Supercharger - 6G Celicas Forums

Topic #75430 164 posts Started by al94st
So first off, I've been using this forum a lot for reference and information in the past few months and it's a great tool for anyone who owns a Celica, so thanks to everyone who puts up good information.
I'm in the process of rebuilding my 7afe. It had 136000 on it when i pulled it out, but it hardly looked like 30000 were on it once i opened it up except for some oil sludge. I purchased a V-5 vortech f-trim to put on after i get the car running again, but I figured I'd share a few pics of the rebuild and update some more when I get to the fun stuff.
Pulled the engine in Feb, (i travel around the world a lot, so I've been off and on with this project) brought block and head to my machinist. Block only needed a fine hone. Head didn't need much, but had a valve job done just to freshen it up since 16 yrs on the valve springs is probably enough. Started rebuilding on Wednesday and relaxed today, I might finish rebuilding tomorrow.


Block painted and piston one reinstalled.




nice picture of the little 7a rods


head and cams installed, water pump on


timing belt installed

This post has been edited by al94st: Nov 1, 2011 - 5:35 AM
wow. very unique. Have never heard of anyone putting a supercharger on a 7a. keep the info comming
i have thought about this because of instant boost and great low rpm tq. this may turn out to be a start of a whole new way to power the 7a"S..... great work man keep us up to date
if you want some low rpm power get some cams work done
As far as I've seen the stock cams are designed for low rpm power and efficiency, that's part of why the 7a gets sluggish in the high RPMs. Grinding the cams is going to give you better power in the upper RPM range. I don't think it'll do too much for low RPM hp and torque.
I'm very interested to see how this'll turn out, I was under the impression that a supercharger on a 7A was impossible due to the positioning of the intake manifold.

'97 ST\ Eibach \ KYB \ Kenwood \ Alpine \ Cusco \ OEM+[sold 10/18]'93 MX-5LE
This should prove to be interesting.

"God created turbo lag to give V8's a chance"
the v5 might be a little big for the 7a, but props on building the brackets to make it all fit. it's a good blower.
Quick update. Yesterday I started and timed the engine without any problems. I'll try to get a couple pictures of the car up in the next few days. Once I get the car back on the road I'll break in the engine then start installing the blower.
Nice vid find, GL with your build bro, this is def different.
very interesting indeed. I'll be peeking into this thread to see how it goes. Good Luck with everything. hope it turns out well.

*1997 Celica ST - 3SGE Greytop BEAMS*1977 Celica RA29 - Classic Cruiser*2005 Matrix AWD - dedded but still hanging around like a ghost2019 Rav4 XLE Premium - Sports mode is fun.
I've put about 90 miles on it since rebuild. I also installed my megan coilovers. Very happy with them. I had a header on the car when I put the engine back in, but I decided to take it off until I have more time to mess with the exhaust. I plan to go 2.5". Current setup is stock with supertrapp muffler. I'll probably start messing with the blower in a month or so.


This post has been edited by al94st: Mar 18, 2011 - 8:18 PM
Quick update on this. Haven't given up on the project, just on hold for awhile because I'm in the process of relocating to NC. Just installed a new exhaust system.

In order to make the Vortech fit nicely, I need to make a solid motor mount for the passenger side that attaches further back on the frame to open up some room and help with the supercharger mounting. Then the relay box and windshield washer filler tube need to be moved (which is simple). It might just fit under the hood after that.
What part of NC? im located just outside of raleigh
Nice choice of wheels! I dunno how to explain it, but they flow nicely with the body lines. I can't wait to see a supercharged 7A, that'll be cool.

taking too long to mod since '09June '12 COTM'95 AT200
might have to take the 2 1/2 hour drive to check it out when your all done
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QUOTE (HectortheRican @ Nov 2, 2010 - 6:00 PM) *
>Nice choice of wheels! I dunno how to explain it, but they flow nicely with the body lines. I can't wait to see a supercharged 7A, that'll be cool.

Thanks, they're 15x7 Drag Dr-17's. They're like 14 lbs I think. Discounttire.com sells them for 100 a piece including the hubcentric rings and lug nuts.

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QUOTE (celica74 @ Nov 2, 2010 - 6:05 PM) *
>might have to take the 2 1/2 hour drive to check it out when your all done

Might take a little bit frown.gif , but that'd be cool.
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QUOTE (al94st @ Nov 2, 2010 - 5:29 PM) *
>Thanks, they're 15x7 Drag Dr-17's. They're like 14 lbs I think. Discounttire.com sells them for 100 a piece including the hubcentric rings and lug nuts.

Haha thanks, I'll keep that in mind when looking for replacements. Right now I have 17x7.5 Drag DR-19's.

taking too long to mod since '09June '12 COTM'95 AT200
2.5" exhaust is going to be a tad big for a 7A, even when it's supercharged (or turboed too for that matter); you'll lose some low-end torque due to lack of back pressure. You might want to reconsider and go with 2.25" exhaust.

PS: I <3 this thread already and will be very interested to see how it progresses!

This post has been edited by GriffGirl: Nov 11, 2010 - 3:14 PM
I actually just redid the exhaust to make the car my daily driver again, now that I'm not traveling all over the world for work. I put in a silver powder coated ebay header and down pipe (which is burning off the powder coating nicely, but at 45 bucks who can complain) cut out the cat and ran a Walker resonator pipe and Walker stainless quiet flow muffler. It's all 2" for now.

Also disconnected the second O2 sensor and haven't had a light or any issues. (yay for pre 96)

This post has been edited by al94st: Nov 11, 2010 - 3:28 PM
Finally getting back to this project, bought supra 315s and 2 bar map off of Manny. Haven't decided if I want to buy engine management or wait to see how it goes without it. Has anyone run 315 injectors, 2bar with no tuning on the 7a?
Went to dyno day at a speed shop down the road today, kindasad.gif seeing the power some cars are putting down these days makes me wonder why I'm doing this in the first place haha.

This post has been edited by al94st: Mar 22, 2011 - 8:50 PM
awesome work, can not wait to see how this ends up

Power in Balance90 ST coupe- Sold95 ST hatch- Dead :’(02 Impreza RS- DD
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QUOTE (al94st @ Mar 6, 2011 - 5:22 AM) *
>Finally getting back to this project, bought supra 315s and 2 bar map off of Manny. Haven't decided if I want to buy engine management or wait to see how it goes without it. Has anyone run 315 injectors, 2bar with no tuning on the 7a?
Went to dyno day at a speed shop down the road today, kindasad.gif seeing the power some cars are putting down these days makes me wonder why I'm doing this in the to first place haha.


I often wonder the same thing...Just remember your Celica will be/is one of kind.
Having trouble locating a good oil feed adapter block to purchase, any ideas?
Oil pan painted and oil return installed...10an


Oil pan reinstalled
Well, my walbro fuel pump, stoich gauge, breather tank, NGK plugs, and new welder got delivered yesterday, so I suppose I have some work to do this weekend. Once my pulley from Vortech comes in on Monday, I'll be able to start making up some brackets for the damn thing.
Finally got my gauge holder finished and gauges all set up. I wanted something different than pillar pods, so I did this:

just so you guys get an idea of where this bad boy is going. I'm moving the alternator to the rear of the engine, the blower will be run off the inner (4rib) belt, the same one that spins the A/C compressor.