Stroker Kits

[Alex]

I assumed Mikey is on about at a similar rev limit.

 

In which case the stock sized engine isn't being pushed to the limit....like the stroked one.

[Guest Terry S]

So, money being no object (obviously thinking of rich guys like Terry here ) would the ideal scenario be to have a stroker kit and a big single? Or am I talking bollocks again!

 

well that depends, you could use the same big single and just rev it higher. The low end grunt of the stroker would be lovely, but I know of 1 trashed HKS stroker here in the UK already and I really wouldnt want that sitting in my Garage.....

[Guest Terry S]

In which case the stock sized engine isn't being pushed to the limit....like the stroked one.

 

Agreed, but with the stock displacement one we are talking modified top end parts to allow those revs.

[CJ]

Yes it can.

 

The max dia of a 2JZ piston it 87mm...

The biggest stroker kit it 3.4L...

 

And engine able to run to 9500rpm at 40+PSI using stock sizes will beat the 8000rpm limited stroker.

On a more serious note. I am looking to compare performances on our engines rather than one that could run 9500rpm and those kind of boost figures.

 

Ideally, I would like a comparison using an engine like mine as a target.

[Alex]

But 40+ psi is 2.8 bar

 

ok 59psi then

 

My point is...Boost and RPM's will show alot of bigger engined cars who's the daddy

 

3.4L's ain't that much bigger....go for a Tundra 5.5 instead (can anyone guess what my lottery win project would be )

[mikeyb10supra]

I assumed Mikey is on about at a similar rev limit.

 

Just waiting for Digsy to do a 35,000 word write up for us

 

sorry for not being clear guys, this is basically what I meant terry

[mikeyb10supra]

ok 59psi then

 

My point is...Boost and RPM's will show alot of bigger engined cars who's the daddy

 

3.4L's ain't that much bigger....go for a Tundra 5.5 instead (can anyone guess what my lottery win project would be )

 

you need to scope in reliability issues into this equasion though, its correct what your saying but its not reliable power.....as oposed to a bigger capacity engine running less boost

[CJ]

well that depends, you could use the same big single and just rev it higher. The low end grunt of the stroker would be lovely, but I know of 1 trashed HKS stroker here in the UK already and I really wouldnt want that sitting in my Garage.....

I agree, I wouldnt want a trashed engine either but the thread wasn't meant to be about specific makes rather the concept.

[Alex]

Don't get me wrong I'd like a stroked engine....but I don't know if a 3.2 or 3.4 kit is worth it when for less money you could have a built head and built block revving like mad and giving you more in gear performance.

[CJ]

Don't get me wrong I'd like a stroked engine....but I don't know if a 3.2 or 3.4 kit is worth it when for less money you could have a built head and built block revving like mad and giving you more in gear performance.

That was what I was strying to establish Alex. Like you, I am struggling to see VFM in aproximately £4k of kit

[Alex]

4k min (more like 5 IMO) of kit + fitting....and that's a lot of labour

[Ian C]

I agree. The willy waving factor of a 3.4 would be incredible, but I'd rather spend £800 on a new stock block and swap it myself should the worst happen, rather than 4 grand on *parts alone*, never mind fitting and balancing...

 

-Ian

[Guest Terry S]

That was what I was strying to establish Alex. Like you, I am struggling to see VFM in aproximately £4k of kit

 

I thought they were more than that?

 

Anyway, there is, AFAIK, nothing wrong with the HKS kit, its more that we can readily get spares for the stock Crank, but stroker spares seem a different matter. In an ideal world we would have a 5 litre 2JZ, built by Toyota, with a GT42R bolted to it making full boost by 3500 rpm, but that just isnt gonna happen.

 

Your money could be better spent elsewhere IMHO.

[Alex]

Wow 3 pages in about 40mins...lol

[CJ]

I thought they were more than that?

It was just an approximation Tel. Dusty has them on sale at $7999 ATM

 

In an ideal world we would have a 5 litre 2JZ, built by Toyota, with a GT42R bolted to it making full boost by 3500 rpm, but that just isnt gonna happen.

 

Your money could be better spent elsewhere IMHO.

I would agree - it really doesn't seem good VFM

[CJ]

Wow 3 pages in about 40mins...lol

[best TV ad voice] "I do start exceedingly good threads"

[fastisnice]

I think it depends on what you want to achieve,if i could afford it I would go for it. You do get a lot more torque lower down...Having a big single-

Now imagine how much quicker you could get off the line and use that torque low down- You could replace the 3.4 conversion by having NOS "low down" ONLY to get rid of the lag...(Much cheaper solution - More power as well)

 

This is what Im going for anyway -

[CJ]

I know of another member who is developing a supercharger system to work in conjunction with a big single. If that comes off it will be awesome.

[fastisnice]

!!!!!!!!!!!!!!!!

[JohnA]

In a previous life I had bored a turbo bike up by 10%

In theory up from 750cc to 810cc, in reality 738cc up to 808cc I think.

It didn't cost me too much, since the cyl block could come out with the engine staying in the frame, and I had to change pistons anyway (melted them to buggery on a very long straight, as you do)

 

The boost threshold lowered by around 400rpm, instead of making positive boost at 6400rpm it was making at 6000rpm, and it felt stronger all over the rev range. More gases -> same turbo, as expected really.

Never felt that 'reluctance' to rev high that people talk about, in fact it would rev even more manically with the cams massaged a bit.

 

Off-boost was bliss with the extra cubes, and making boost earlier made me smile every time. (Didn't last long, but hey...)

[Jake]

Never felt that 'reluctance' to rev high that people talk about, in fact it would rev even more manically with the cams massaged a bit.

but you're talking about big bore kits. They're a completely different kettle o'fish to stroker kits. Increasing the stoke will hurt the ability to rev a lot more than increasing the bore.

[Alex]

but you're talking about big bore kits. They're a completely different kettle o'fish to stroker kits. Increasing the stoke will hurt the ability to rev a lot more than increasing the bore.

 

Yup...

[JohnA]

True, I was really commenting on the effect of earlier turbo operation and slightly quicker spoolup.

 

A longer stroke should impede max revving in theory, yes.

[attilauk]

surely a properly balanced and strengthened stroked 2JZ-GTE would be able to rev as high as a stock stroke length engine (i understand the longer the stroke then the higher the strain on the rods but 9k rpm should still be achieveable)

 

i know of Type 1 VW engines that are bored and stroked to nearly twice their original capacity that rev to over 9k rpm (ok its slightly different with the type 1 as larger barrels and pistons can be fitted but its still a 70 year old engine design)

[JohnA]

It's the absolute piston acceleration that is the problem, a few millimetres too much stroke and it goes over the edge, into the 'dark side'

 

Is the stroke of the VW engines comparable to the 2JZ?