Thanks Daveo for the support

 

What were your terminals?

 

Dave,

What you can confim is the figures mentioned are those on the dyno sheet.

Can you see what the temperature is on the MD304 dyno plot?

I am confused why a turbo which is generally identical to the VF34, except it has a higher flowing exhaust housing and a physically larger, higher flowig compressor wheel, has a lower power potential.

Paul

 

Me too My experience is that the MD304 is very similar to the TD05 in spool/power capability. The VF34 generally spools slightly quicker due to the smaller exhaust housing but can't match the power of the TD05 or 304

Andy

 

I'll dig out the dyno plot and report the temperature figures as soon as i can.

I think Mike (Bighead) changed to a VF 34 because he didn't like the spool characteristics of the MD304, that's why he sold it to me.

Am I right in thinking the MD304 is a good turbo, and is gonna add to my sti wagon over the standard VF28? All I've read is good press bout this turbo.

 

the MD304 served P20spd very well...

 

IMO, the md304 spools similar to a TD05/06-20g with the power at the top similar to a TD05-16g.

on a UK car , for my driving preference I find the md304 and 20g a bit to peaky higher up for a standard(ish) rev limit , however on a sti unit both are more suited to the stretched rev limit.

it is hard to know how it will perform compared to a vf28 until back to back tests are done on the same car. I do not know what state of tune your car is in at the moment but it might be worth finding out how much you can get out the vf28 before the swap. harvey had a few vf28 figures which where very high but his attention to detail helps as did I believe , his ion headers with large bore up-pipe which I found make a turbo perform bigger. (I ran large bore gruppe-s headers for a while and had a better top-end than I do now with the smaller bore phase 2 set, the smaller bore set feel livelier in the mid range with better spool though so I prefer them).

 

Yes Daveo.... the MD is a very good turbo, as you have stated " I did not like the spool up on it so hence the change .

when it had made 340bhp on the car it was without the Gruppe-S headers and Motec ( only the Tek3 by Bob ) ......just a thoughts

 

My car has had the following mods:

hks 2.2 stroker kit (pistons and crank)
GGR H section con rods
sti 8 intercooler
motorsport fuel pump
mocal oil cooler
helix group n clutch
fidanza lightened flywheel
hks evc 5 boost controller
hks fcd
Magnex turbo back exhaust
Standard sti injectors

Getting a Power FC fitted week after next by Andy (at last) to hopefully bring it all together

My VF28 was on it's way out and when the MD came up for sale I thought it would be a good time to change.

I'm looking for about 360bhp but that might be pushing it on the standard injectors, from what i can gather.

 

If anything I think an MD304 is a bit small for a 2.2 revving to 8000 RPM, which has similar turbo sizing requirements to a 2.5 revving to 7000 RPM. Should be nice and torquey, but the power will peak early and flatten if you run decent boost. No bad thing if that is what you want, but the turbine is a bit on the weeny side to make the most of your engine IMHO.

 

Ok John I'll see how i get on with the md and maybe upgrade at a later date if it's not what i'm after.

Dave

 

Do you still have the modified cams in it Dave ?

Andy

 

Personally I would go for a gt30 or similar on the 2.2

 

Yeah forgot to mention the piper repro cams...they're the reason for the car being delayed (shims??). Not sure what spec they are..fast road I think.

Looking forward to visiting you week after next!!

 

I don't honestly think the GT30 series is necessarily worth it on a 2.2. Having seen a 2.2 with all the cams, headwork, custom ex manifold, custom intercooler on the rollers at power engineering, I didn't think it was that good. Given what you can get from a bolt on turbo, that in theory should be poor, but in practice works really well, the GT series needs a little more work IMHO.

Sometimes they work really well, but I think they need a little more playing with cartridges and exhaust housings when used in anything but the big build 2.5s and larger.

Having gone from a mitsubishi bolt on hybrid to a 52 trim GT30 myself, I can't honestly say it was worth the upgrade in sheer power terms. Although it has other benefits, such as wider range of boost control, surge free operation, enough exhaust flow to run nitrous, slightly better pipework, and the ability to swap for a much larger turbo.

If you haven't already spent money on things like (normal) up and downpipe, inlet pipes etc, the GT turbo route is much more economical, and worth persuing.

Paul

 

Interesting Paul. What do you think would be the best bolt on turbo then to avoid the surge and creep issues? The P450 has neither of these vices, but is no fireball either. Is there a Superzilla that would be about right do you think without being too compressor biased?

 

possibly so paul, but the good thing is with the GT series, if and when you need to, you can just swap bits

 

I think the plain Superzilla with the 49lb comp wheel is going to be there or there abouts, ie, probably the same performance as the P450 but for less money. On a 2.2 creep in general isn't going to be an issue anyway (with correct porting).

I also think the version with the 52trim Garrett wheel, as used in your P450 should work. This is what Jan has in sweden after I recommended it (I didn't supply though), and with proper porting the creep is sorted, and I don't think he has any surge issues either.

My GT30 would be a good I think on a 2.2 with the 0.63 housing.

Paul

 

That is the main reason I purchased mine. I can go as low as 400 and as high as 600+ potential in the same format now.

David,
Any idea of the housing Cord uses?

Also, I had a chance to look at an HKS version of the 3037s. Their 0.86 housing (with T25 inlet flange), was about the same size as the Garrett 0.63 housing, which i found interesting. It certainly explains how people were getting away with the 1.06 HKS housing, which I imagine is about the same size as he Garrett 0.82 part.

Paul

 

What about the AVO 500 and 600?

 

I don't understand quite why they don't seem to work. Perhaps the housing isn't quite right somehow, but they always seem very laggy for the power they make.

Paul

 

I dunno what trim, but I belive its a 3037..

David

 

David,

Cord's turbo is a garrett GT30R AFAIK, but either way there are a number of housings available for the garrett and HKS variants. i would be interested to know which housing he has. Will PM him or post on his 22b thread.

Paul

 

approx 95 to 106 from memory?? (over a year ago i will have the cards sumwhere)
1.773 60foot time as well (also from memory)

could be miles out lol

 

found it online in my photobucket album



got a 13.11 @ 104 with a 60ft time of 1.857
13.17 @ 103 mph with a 60ft time of 1.836
13.12 @ 104 mph 60ft time 1.910
13.06 @ 102 mph 60ft 1.749

all the above times were on the stock vf 22

times should be improved sumwhat now i rekon (full decat, vf 23 running more boost, flywheel and grippy clutch )

 

another

13.07 @ 99mph - 1.863

i have 49 timed cards here, who said scoobys had choclate pistons
current max out on the 1.25mile thingy is 146mph but im not that kean on doing these with the TMIC and stuff

 

Those elvington terminals are often suspect. I was getting an 8mph difference between lanes at the shootout and about 6mph difference at TOTB

Paul

 

If you want good terminals get a dose of N2O (nawz) A 50 shot only dropped my terminals by 0.2 secs but added a whopping 8mph to the terminal speed

Andy

 

Hi guys, About this thread, Ive read most of it and its got me very interested. This VF 34 TURBO. Is it a remap and turbo just for Seats Ibizas and Subarus? I have a 2.0 Turbo Astra and i am wanting to put some serious power into her. Do you know if Prosport do this turbo for Vauxhalls.?

Sorry to go off topic a bit. Does anyone have a link to the Prosport site where you get it done.

 

As long as it fits in the space available and you have the manifold and all the other bits to fit and someone who can map it anything is possible. Scooby owners seem to favour the Td05. I cant complain i like the way my vf34 performs.