Quad 4 swap (lot of pics) (Page 3/31)
Fierobsessed JUN 20, 09:20 PM
One more thing, The transmission on my old Quad is a 3.94:1 unit from an Achieva SCX. It NEEDS work. It is functional, but I think some synchros and or shift forks were messed up from day one. You're probably going to have to mishmash a few Getrags to make one good one.

Also, with that slave adaptor, You do obviously use a stock getrag slave. However... The shift arm that it actuates is much shorter then the Fiero's Getrag. There are two consequences to that. You would need to put a clutch stop in place to restrict the travel. The other issue is that the pedal is fairly hard. It feels like a very heavily sprung pressure plate, even though it is stock.

I've heard that the plastic slave that is designed for the Q4's getrag with the Fiero's master has too short a stroke, so this was the solution I came up with. I didn't use a stroke limiter, but probably should have.
sardonyx247 JUN 21, 07:40 PM
Here is how I like to keep the bolts organized.
If it is going to be a long time between disassembly and reassembly, ziplock bags and marking the bags with a sharpie is a better way.




A good way to keep the valves in order




The pile of parts, really a small pile compared to other engines.




The fuel rail and injectors.




The bottom of the cam covers.






The tappets that fit in the cam covers and sit on top of the valves.






I thought this was a cool feature. The valve springs sit on top of bearings instead of just the head.



[This message has been edited by sardonyx247 (edited 06-22-2012).]

ericjon262 JUN 22, 12:28 AM
damn! after reading up a little on the quad four, I wish I had done a Q4 swap instead of my 3500 I'm working on! 180hp four cylinder! that's impressive!

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there's a Group on 60degreeV6.com for us 660 Fiero owners!

Fiero Owner's group on 60degreeV6.com

I know these lines Look crooked on paper, but I swear I've got them straight in my head.

sardonyx247 JUN 22, 06:47 AM

quote
Originally posted by ericjon262:

damn! after reading up a little on the quad four, I wish I had done a Q4 swap instead of my 3500 I'm working on! 180hp four cylinder! that's impressive!




And that is stock before any modding, fully modded I have seen them up to 220 N/A. That was 8 years ago, prob more now. Boosted ones are hitting over 400HP.
I am hoping for 200hp myself.

Fierobsessed hit 166.6HP at the wheels in the indy, with no porting. video here --> http://www.streetfire.net/v...o1666-hp-6_17460.htm
sardonyx247 JUN 22, 07:11 AM
Speaking of porting.....


Here is the 753 head I have to work with. Rated at 5HP less than the 086.








The intake ports, same size as the 086 head. BTW the 086 is the best flowing head.




The exhaust ports. They are a litte smaller than the 086 head. Thus the 5HP less and the exhaust manifold for the 753 is a little smaller too, but I won't be useing that manifold.




Exhaust ports, 753 on top, 086 on the bottom.




I made a template from the 086 head.




How it looks on the 753 head.




I used a sharpie to mark the differance.
sardonyx247 JUN 22, 07:32 AM
After opening up the exhaust ports.

The 086 exhaust port to compare.




One side of the port opened up to match the 086 head.






All the ports matched.
















The cutting tool I used, it is a very aggressive aluminum cutting bit, cuts very fast and doesn't clog up.




And what I used to make sure the port are the same size as the 086.




Now it flows the same as the 086 head.
I still have to port the bowls on the exhaust and smooth it all out. Then smooth out the intake side, no gains on opening up the intake, just smooth it out. Most gains on porting a Quad head comes from the exhaust. I do have this very nice cut-a-way of a Quad head.




More porting to do tomorrow.
Fierobsessed JUN 22, 07:45 AM
It's a good little engine. It got me 33 MPG on the highway without breaking a sweat, I probably could have gotten much more out of it if I wasn't busy making SO much noise.

It is an engine that does deliver! It's SMALLER then a duke displacement wise, and it is only a bit heavier. It gets the same mileage as a duke, but puts out twice the power easily. It's also a bunch of fun to drive!

It's not an easy swap however. It requires a bit of work to make the mounts work, and even then, you're very hard pressed to get it to fit under a deck lid because it is so tall. A good exhaust is hard to do too since the exhaust must exit the rear of the engine, you are almost forced to either cut the trunk, or make a snakey mess single exhaust, or go without a cat. Or do what I did and make a few noise complaints in the process. At least it sounds NOTHING like an import for some reason.

I'm glad I did the swap, but I'll be happy again when the next engine goes into the Indy. When I get my act together that car is getting some royal treatment... Not disclosing yet, not in Dave's build thread anyway. This is his baby.
Quad GT JUN 22, 12:31 PM
Since 1992 Ive been driving my "85 GT with a Quad 4 16V H.O.
This little motor just never quits and loves revving
Soon Im going to have to do a full rebuild, any particular mods that you suggest? Turbo? Now that would be interesting.
MarkS JUN 22, 06:18 PM
Great thread!! Used to be a site, Mantapart that had lots of stuff for the Quad, sadly, looks like it is no longer. When he was retiring (2010), looks like he tried to sell the business, but seems no one picked it up.

BR's,

Mark

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86 SE V6 4 speed
86 SE V6 Auto
2008 G6 GT "Street" Coupe
2005 Buick 3.6 Rendezvous
2001 Olds Silhouette (AKA The Band Van)

gtoformula JUN 22, 10:33 PM
PM sent re Kent Moore Quad 4 tool set