Compound pics

[andy2]

I'm hoping that the 12mm head will turn that smoke into useable power and as well as that 35-37 psi would probably be enough to produce 200hp IMO.Without adding more fuel I believe a good 15-25 hp alone will be gained with all thats been improved,That would be somewhere around 180 hp.

The PD100 rods were the best "bolt on" option I had, they will hold a little above 200hp but by how much nore??

As Bruce mentioned we have a little more piston to cylinder wall clearance this time around which will help.After the engine is broke in I will use a good synthetic oil like Elf.Also a contrubiting part of the damage was probably due to high engine oil temp and non synthetic oil.This time around I've got a temp gauge and a nice oil cooler rarther than the factory heat exchanger.EGT's will likely drop considerably with all the mods thats been done too.As long as the pyro does't sit too long at 1500 deg by the end of the track and I have Whatever hp I won't bother trying to get more power as I have more control this time around, I think :twisted:

[andy2]

Fineally a pic of it all back together!We may have some HY spoolage problems,I'll keep you all posted on that issue as I figure out whats happening.I dynoed the car this weekend running 30 psi on k24 only.

161.7 WHP @4060 rpm
225.7 ft-lbs@3445 rpm

Heres the link from the dyno GTG
 
http://vwdiesel.net/phpBB/viewtopic.php?t=3940

[935racer]

Good dyno run! Thats the highest LEGIT dyno run I have seen for an IDI vw so far! Get some more fuel and my custom cam in there man! So whats the verdict on the hy? Too big? Or is ther another issue causing lack of spool? Whats your backpressure like on pre k24 and than pre HY? How much boost are you running on the k24?

[andy2]

I'm testing the hy tomarrow night,as well as setting up the k24's wastegate to open at 20 psi.Then some more fuel :twisted:

[greggearhead]

I am a compound newbie - when the K24 wastegate opens, it dumps into the HY to help it spool, correct?

[andy2]

Thats correct.

[b13bliss]

I'm testing the hy tomarrow night,as well as setting up the k24's wastegate to open at 20 psi.Then some more fuel :twisted:

I love your project and congrats on getting it running!  I like your approach of letting the K24 stay in its' best efficiency range and giving all that extra energy to the HY.  I think if you stay in it a little longer, it'll spool

[935racer]

Hey andy, wanna race to see who can get a dyno sheet with over 200WHP? Nothin bettin on it, just bragging rights :twisted:  I think you havea  good head start though, I dont even get my pistons back from cermaic coating until friday  And I still need to get my total seal rings.

[andy2]

The hy spools just fine,With some more setup It'll work better.

200 WHP bragging rights .Don't worry I'll probably wait for you to catch up as I'd like my engine to last a little while.Still though 40 hp more is not to far out of reach just cross you fingers hoping that she'll hold together :twisted:.

[935racer]

so was it just a matter of getting the wastegate to come on sooner or add more fuel or what???

Ps for fuel I got a 14mm head commin :twisted:  :twisted:  :twisted:

[SMOKEYDUB]

t6his shall be rather interesting. so can you feel any extra power with it starting to spool now?noticeable?

[greggearhead]

200 WHP bragging rights .Don't worry I'll probably wait for you to catch up as I'd like my engine to last a little while.

What do you guys think are the weak links?  You have a custom girdle, right?  PD rods?  You think the headgasket is the weak link now, even with those head studs you have, or something else?

[andy2]

Its hard to say now what the weakest link might be,Time will tell probably :roll:.I spiked the k24 at 37 psi without and headgasket leakage.

I have some disapointing news about the twins .They are just not working right.It seems that the k24 compressor just isn't big enough to allow proper flow of the hy through it.After endless testing with wastegate and fueling,monitoring egts and 2 boost gauges I have figured the only way to make good boost and "extreme" hp Is to run the hy as a single turbo.

The hy spools alot better than I first expected.Its not far off the k24/t3 by any means,espically when the exhaust is directed to it through in a custom header.

The "proper" sizing of twins Is still a good option for streetable applications.I just feel that for all out hp the big single is the way to go!

Back to the drawing board for now.When the car is down for the single turbo work I will be modding the pump and installing the passenger preformance cam as well.As Dave mentioned his cam will help with lag anyways.

[malone]

Well that's still good.. at least the TDI guys won't be able to use your twin turbos as an excuse for your IDI making awesome power with relatively low smoke :twisted: It seems there's more in your IDI than just K24+HY35 compounds with the HY not fully spooled up.

Anyway, hopefully the single HY35 can make good max. boost.

[DVST8R]

I think imho that hte wastegate area of either the t3 or the k24 is just to small and restrctive to be used as the small tubo, I belive that it would have to be a large external wastegate or a differt setup for a internal wasted gate to make it work. I had my suspsions when I was first peiceing together my origional idea for twins 2years ago, but never was able to test the theory.

You are right for all out power on a dyno or down the strip a big single will win every time, However for drivability twins are where it is at. Keep us informed of how things are going.