4g61t.org

Chris,

I apologize, I was just giving my personal experience, and I knew you had a great writeup.

I think the important thing to mention, however, is the worthlessness of the 1.6L DOHC. The 4G63's are far easier to get ahold of and buy parts for, and they are a direct swap. Strok a 2.0L to 2.3L and you will be MUCH happier. I've actually had the pleasure to see a buddy's 2.3L in action with an FP3065....amazing.

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2003 Evo, 89 Mirage Turbo, 88 Conquest 4G64

Far out. Back to basics just for you.

If the stroke increases by 13mm then the piston moves both down AND up an extra 6.5mm BOTH WAYS!

Therefore, either the block deck needs to be 6.5mm taller or the rods need to be 6.5mm shorter. In practice the 4G63 block is ~6.5mm taller than the 4G61 block. The 4G64 block with 100mm crank is 6mm taller again.

I meant stroker for stroker. On a 4g63 stroker you move the wrist pin down 6mm (half of 100mm-88mm). For a 4g61t stroker you move the wrist pin down 6.25mm (88mm-75.5mm). Use 150mm rods on everything. Again, .5mm more than a 4g63 stroker piston which we know works.

I highly doubt you could create a reliable piston capable of decent horsepower by moving the wrist pin up over 6mm. It would leave very little room for the rings meaning you would have very thin ring lands, a thin crown and therefore a feeble piston.

If you look at a normal 4G63T piston like this:

You can see there is really no room to move the pin up any where near 6mm.

The only option is to use custom shorter rods which compromises the rod-stroke ratio or a taller 4G63 block.

Every 4g63 stroker out there uses a piston with the wrist pin moved up as I said. Do you want pictures since you don't believe me?

(says the poster who owns a 4g63 stroker himself...)

I concur what chrisGVR4 has said. I just assembled a 2.3 stroker with wisecos like the Ross's pictured in his last post.

C'mon fellas, can we all get on the same damned page?

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Geoff
2013 Genesis 5.0 RSPEC
88 Mazda Turbo II- LSX7
89 2.0 Turbo Colt
13 Ducati 1199 Panigale

Ouch, I stand corrected. (couldn't find any pics fukit - kick my ass-uming arse).

I have a spare 4G61T, I will look to see if it has oil-squirters, I honestly don't even know. It would be nice if it did.

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http://memimage.cardomain.net/member_im ... 3_full.jpg

So this "stroker kit" is doable but we would need the stroker wrist pin to sit 6.25mm lower as opposed to 6mm on g63 strokers. Also anyother machining needed to fit a 88mm crank into that block if not im gonna try it i have a blown g63 home and i can grab a low mileage g61t for 300 bux or so would be interesting to see a 88mmx88mm motor if it allows that much overboring. any ideas?

just go 4g61t, 20g, better injectors, an intercooler, 4g63t ecu, done and done. Your at atleast 250 hp. And dont whine about turbo lag! ittl boost

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4g61t.org
4g61t.com

Make sure you sonic the block if you're going to try 88x88. Plus the crank fit is all conjecture until someone tries it. I just did the math...

Please don't do this...its not worth the money. Davis made 295 hp on his stock internal 61 w/ E316G and bolt ons. The 61 is a stout little motor and can make good power.

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Turning a 4g61t into 1595 cc's of FURY!
10.995 @ 134.44 - http://www.youtube.com/watch?v=bZXvcvzuWGQ

SOLD to the fastest shifting hermaphrodite in CO

how bout the following setup...... 4g67 head 4g63sohc pistons and a cyclone manifold (if you can get it to work). That would give you good low end torque good topend and overall nice 1.8l displacement .In theory but how strong is a 4g63 sohc piston is the question?

The SOHC piston is weak sauce. The stock 61 head is good for more power than you will probably be making, only thing is the cams.
Try this set up, I promise you won't be disappointed...

14B
1G T/B (and don't forget to portmatch the intake or its worthless)
450 DSM injectors
2G MAF
1G ECU (pref '90-'91)
1G cams (I did both, worked wonderfully...retard the exhaust 1 tooth)
2G manifold (ported helps)
2G 02 sensor housing (ported)
3" turbo back exhaust
An intercooler of your choice. (I used a stock 1G)

On this exact set-up on my 1.6 I made 250 hp and 260 ft/lbs @ 18#'s of boost. It would spin the tires hard into third and break loose in first and second anytime boost hit. The next thing you will need is a clutch...the stock one couldn't handle my new power. Davis has almost the same set up with the addition of a E316G, Evo 8 FMIC, AFC and 560 injectors and he is making 295 hp at 20#'s...you should feel it at 24#'s w/ 100 octane.

_________________
Turning a 4g61t into 1595 cc's of FURY!
10.995 @ 134.44 - http://www.youtube.com/watch?v=bZXvcvzuWGQ

SOLD to the fastest shifting hermaphrodite in CO