306 to a 347 questions...

Hozer 88GTConv · 05-06-2005, 09:44 PM

My 306 has 30k on it since new in 2001.
I've got a bad piston ring in number 5, so while I've got it out, I think I'll stroke it.

I think I can probably reuse my flattop TRW pistons, but little else on the shortblock.
I drive the hell out of it.
I plan on putting my TFS TW heads back on too.
But probably new springs, lifters, and pushrods since I use 1.7 rr's. I've got a 75mm tb, 80mm MAF, and 24# inj.

I plan on doing this next month, all machine work will be done by a reputable local shop.
Thanks for any tips...

Gearhead999 · 05-07-2005, 06:41 AM

I don't think you'll be able to reuse your pistons.

When stroking the engine the piston not only goes deeper into the bore, but comes up higher in the bore the same amount.

Stroker pistons usually have the wrist pin moved up toward the crown of the piston to allow for this difference.

~The Jester~ · 05-08-2005, 09:32 AM

Stock compression height pistons WILL NOT work in a stroker. The only exception to that is stock CH 302 pistons in a windsor block with a 393 stroker crank.

I Gar-un-teee those TRW's won't work with a 347 crank. Neither will the rods.

Hozer 88GTConv · 05-08-2005, 09:52 AM

I should've known better...thanks.

Now, any opinion on stroker kits?
http://www.dssracing.com/347rk.html
this looks promising!

05-06-2005, 09:44 PM	#1
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	306 to a 347 questions... My 306 has 30k on it since new in 2001. I've got a bad piston ring in number 5, so while I've got it out, I think I'll stroke it. I think I can probably reuse my flattop TRW pistons, but little else on the shortblock. I drive the hell out of it. I plan on putting my TFS TW heads back on too. But probably new springs, lifters, and pushrods since I use 1.7 rr's. I've got a 75mm tb, 80mm MAF, and 24# inj. I plan on doing this next month, all machine work will be done by a reputable local shop. Thanks for any tips... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

05-07-2005, 06:41 AM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: 306 to a 347 questions... I don't think you'll be able to reuse your pistons. When stroking the engine the piston not only goes deeper into the bore, but comes up higher in the bore the same amount. Stroker pistons usually have the wrist pin moved up toward the crown of the piston to allow for this difference. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

05-08-2005, 09:32 AM	#3
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: 306 to a 347 questions... Stock compression height pistons WILL NOT work in a stroker. The only exception to that is stock CH 302 pistons in a windsor block with a 393 stroker crank. I Gar-un-teee those TRW's won't work with a 347 crank. Neither will the rods. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

05-08-2005, 09:52 AM	#4
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Re: 306 to a 347 questions... I should've known better...thanks. Now, any opinion on stroker kits? http://www.dssracing.com/347rk.html this looks promising! __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

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