Was there any conclusion to this stroke attempt? I stopped by my local mechanic and talked to him about dropping in a 3.5 crank in a 3.0 block. The only problem he could come up with is the pistons would be pushed right out of the block. I remember a guy here on the org did the stroke. How did it turn out, dyno, reliability, and problems?

I also posted in the 4thgen section a list of VQ30DE specs. I'm looking for someone to donate the corresponding specs for the VQ35DE to see if the pistons would be pushed out of the block. As well as to see which components must be used (3.0vs3.5).

 

This may help: http://www.forums.maximaracing.org/v...ighlight=#6148

~THT

 

I am tired of explaining this so go ahead and attempt the project and report back.

 

eheh will do

 

damn nabit SR20DEN you are the devil, you and your information!
Well. Since the block of a VQ35 is the same as the VQ30 just borded and stroked (correct??). Then why wouldn't the stroke setup work, are the 35 pistons shorter to acomidate the stroke? If so would it be possible to shave down a 30 piston to clear the heads.

 

you can stroke the engine with the 3.5 crank, the compression will be higher than stock though. The piston will not come out of the block. Tell your mechanic to actually get some education.

 

Is this confirmed? So this stroke is just getting the crank and rods droped in and balanced?

 

Yeah someone needs education here for sure. Use the search feature and you might figure it out.

 

It is confirmed that it DOES. <~~ # 3465764375675835
No.

 

Are you talking about me?

 

SR20DEN i think youve been missinformed, Tilley has done the swap and no problems.

 

VQ30:
Block Height: 215mm
VQ30 Rod: 147.65mm
stroke radius 36.65mm
Piston Pin height: 30.7mm


VQ35:
Block Height: 215mm
VQ35 Rod: 144.2mm
Stroke Radius: 40.7mm
Piston Pin Height: 30.1mm

144.2 + 40.7 + 30.7 = 215.6mm

 

oh and search, both Matt and Dixit have posted this crap multiple times.

 

ya too bad search doesnt work for most people, wish it did.

Seems pin hight is the problem, .6mm isn't that much would a 3.0 piston be able to stand up to getting that shaved off?

 

It probably could but I don't have the exact data on the pin heights. I had to extrapolate it from the other data that is availible. Therefore it could be more or less than 0.6mm.

 

A mm, is a very small amout of material, so this project may not be lost. I will contact Tilley and see what he did to get it going.

 

It is still a waste of time considering the fact that you can have the entire 3498cc engine vs. a 3339cc engine.

And I thought that was what he did.

 

I Used A 3.5 Bottom End And 3.0 Heads!!!!!!!!!!!!!

 

Can you PLEASE detail what you custom fabricated or reused and from which engine.

How's it working out with the high compression ratio?

 

SUNDAY IT GOES IN!!!!!! OH YEAH

 

Got baseline dynos/timeslips ? Man this is going to be something really cool .

 

Tilley make sure you keep us up to date, I'm freaking out !

I'd also like a short rundown of your setup IE which parts and whatnot.

 

or Sunday we hear about an engine blown in record time thanks to high compression and insufficient fuel delivery or somethin...

 

See folks. This is exactly what I have been trying to tell you. SKIP this VQ33 crappolla and use the WHOLE 3.5 liters.

There are several ways to do it and he is listing one of them.

Now it remains to be seen exactly how much power can be extracted through those VQ30 heads.

Tilley, are you using the VQ35 cams? If not, you should be. Along with the VQ35 retainers.

 

Nothing should need fabrication for this specific job.

 

3.0 dyno was done last week with hai, stillen y pipe, cat back, and udp 175hp and 186 tq.