3400 stroker kit

[montess408]

hey dave do you know how to messure up a motor for stroke ?
because i want to know if i can stroke my crank .200 and still use stock 3400 rods and stock syle pistons ?

[Superdave]

hey dave do you know how to messure up a motor for stroke ?
because i want to know if i can stroke my crank .200 and still use stock 3400 rods and stock syle pistons ?

best to have a machine shop do that..

[ForcedFirebird]

It would be easier to stroke the 3500 crank. You can offset gring it .125", that would give you .25" more stroke.

Joseph Upson got a quote for $400 to offset gring the crank to 1.99", then the 3400 rods will fit since the 3500 crank has a 2.249" journal. Then you will need the external DIS ring IIRC for $150. Then you have to consider the deck height because your pistons are below the deck, hence post #11.

[ForcedFirebird]

best to have a machine shop do that..

I happen to know one, lol.

Wonder if we should produce a kit?

[Superdave]

I happen to know one, lol.

Wonder if we should produce a kit?

the gains VS cash factor is a little lacking though... i can see if you could bring the displacement up by a large margin like from 3.4 to like 3.8L but just stroking a 3.4 to a 3.5 isn't going to produce any drastic gains. doing a little head work, top end swap, upping the SCR, adding a cam, headers, etc.. all those produce gains worth the money. $400+ to gain like 5 HP and maybe 10 TQ?

[ForcedFirebird]

ehhhem, that would make the 3.4 go to 219 cubes (3.6l). The 3.4 is really a 3.3 (204 cubes, measured it 100 times). The 3500 would be 3.7l.

I agree, though, it would be more like $6-800 by them time it's all said and done. That will buy a decent 3500 without accys, maybe even a 3900.

[montess408]

i was gonna stroke my crank to 3.510 and bor to 3.680 and i would end up with 224ci or3670.6 cc pretty close to 3.7 L

[G-U-NOT]

Im sticking with the 3400, but Im also using a full 3500 topend! Those heads already lower the SCR as is.
Im also gonna be going with a turbo, so I dont want high compression!
So lets just say I modify a 3500 crank, how much would I need to mill my heads down in order to get it back it to 9:1?

[ForcedFirebird]

Im sticking with the 3400, but Im also using a full 3500 topend! Those heads already lower the SCR as is.
Im also gonna be going with a turbo, so I dont want high compression!
So lets just say I modify a 3500 crank, how much would I need to mill my heads down in order to get it back it to 9:1?

3500 heads and gaskets with 3400 pistons is already 9.1: IIRC. Have you used the CR Calculator here yet? It's located on the left sidebar under "miscellaneous".

[G-U-NOT]

3500 heads and gaskets with 3400 pistons is already 9.1: IIRC. Have you used the CR Calculator here yet? It's located on the left sidebar under "miscellaneous".

Yea I did, but someone told me that my CR would be below 9:1 with 3500 heads on a 3400.