ok, i need help on this one. i get my engine back from my engine builder next week and im stuck on what will match my engine best.

in an ideal world i would like easily over 700whp. ( id be disappointed if i didnt make at least 700whp )

a basic general outline of the engine is as follows

13b rew
largest bridgeports i could have
exhaust ports enlarged as far as they will go and exhaust sleeves removed
lightened and balanced rotating assembly
2 piece e shaft
high tensile oversized stud kit

im wanting to rev over 10,000 rpm aswell by the way.

gt45r or gt47 for dragracing application? or any other turbo you guys can suggest?

ps im crap with turbo trims and compressor wheel diameters so keep it simple for me

cheers

 

gt45r's spool fast, you'll need bigger injectors, a custom intake would be a good idea. Think about alcohol injection.

 

Can't go wrong with the Borg Warner S400 series.

 

yeah thats all in the pipeline.dont really want to go into all that on here yet just concentrating on the turbo.

Trots*88TII-AE* - just had an email of forcedinductions funnily enough, recommending the BW s400 80mm, seems a very good price aswell. 1200 dollars with the race housing on. never heard of these in uk but everyone seems to be raving about how good they are in the states.

 

Maybe a GT45R is a little too big for a 2 rotor especially considering your power goals? ErnieT made over 800 rwhp on a brideport with a cast 42R. Maybe look into Garrett's new GTX line for the GTX-4294R or GTX-4202R. I'm assuming you'd want the bigger of the 2 with a large A/R

thewird

 

yeah get a new GTXR turbo with Tial Vband rear,. Vband mani, dual WG,. you def need meth.

 

the issue is, jamies talking UK figures, not dynojet US figures.

uk dynos read around 10-15% less than you guys over there.

for example a s475 on a massive bridgeport at 1.8bar of boost did 599whp over here doing mid 140s terminal, since jamie(im assuming its willday) wants to be running mid-low 9s then hes going to need over 150mph terminals hence if ernie is saying hes just over 800whp at 149mph, jamie needs to look at 850whp 'US numbers'

hence id say either the s480 or the gt45r

id be tempted by the S400-80 ET-R Billet to be honest jamie, costs $1600 and has a awesome flowing comp wheel which you should never outflow....rated at about 1050bhp on a rotary maxed out which is about 900whp our numbers, the normal s480 is rated to 825bhp or 705whp.

Since your after over 700whp i have a feeling it might not be enough unless your thinking of running meth.

If your wondering who this is, remember that fat kid with the white r5 turbo who lived near ians garage who was gonna race you in the final at frog of the pod back in 2005 but you broke your gearbox, thats me, though im suprised to see you on here, the guys said you dont even know how to use a computer!!

 

So basically something along the lines of what a Mustang would make. I had tuned a car the other day that made ~320 rwhp on a Mustang and then we drove down the road (literally) to a dynojet and made 370 rwhp with nothing touched on the car. Thats a 14% difference.

Going by those figures, 700 rwhp + 14% is 798 rwhp. So I still say it can be done on the 42R but but probably easier on the 45R. Garrett does have a billet version of 45R as well, the GTX-4508R which has some serious flow although its not much different then the GTX-4202R. Although the 45R gets max flow with less boost compared to the 42R. I guess your using a 2step so lag wouldn't matter much.




thewird

 

sort of yes, id say mustang is a good idea, for example a stock twin turbo car running 15psi with all the bolt ons does 360bhp(300whp) over here.

thanks for throwing those graphs up.

the gtx4202 does look like an interesting comp map, going off that at 2bar of boost it should do 869bhp(740whp) over here which is above his figure he wanted, just depends how much boost he wants to run.

and also if he can afford it, a gtx is very expensive with it being new tech, if he can suffer a little higher boost threshold then it maybe more beneficial to get the gt45 as its a drag car anyway

If you can give us a boost level you want to go up to jamie, we can give you an idea of what turbo will suit your needs

 

turbo toaster, nah im not willday. i know who you mean though.
im going with the BW s480. my ports are huge so the turbo size shouldnt be a problem. i need all the power higher up the rev range anyway as im going for mega revs.
i know ross from dragon used a gt47 on his engine a few years ago and ran some great times. i want similar times.

i want to run as much boost as possible. i just really want to see how far i can push it. thats why ive went to the extremes of a two piece e shaft and all the balancing and strengthening etc. uk is seems to be quite far behind compared to other countries on the rotary scene. i want to try and raise the bar a bit

 

ah fair enough, were you the guy who posted on fduk wanting 700whp and is having carl build your engine?

i dont think he has built something to that power before, id suggest using ross if you want to go for that sort of power.

hes gonna be mapping mine at 600whp in the new year and hes the only person i would take it to for his experience in this high level of tune.

also ross ran 161mph at the quarter with 850whp hence the need for gt47 but that was on meth, he has done 670whp with a gt45 at 2.2bar of boost on racegas.

So it depends what fuel you run to determine what turbo to get you.

if your looking at a s480 id say you will max that out at 670whp which is below your required number hence i think you should go bigger.


Also the further you push things the more chance of it breaking, i know if i was going for 700whp id just get ross to replicate his drag engine, that way it will do 850whp on meth, 760whp on race gas which would tie into your chosen power.

 

You've received some good advice. Good to see that you're going to be taking the right path...

 

yeah thats me turbo toaster. a lot of people have said that about carl but i but i believe im in good hands and hope he can to prove a few people wrong. we will see. i should be able to extract a lot more horse power more safely than normal by claiming more revs by using the two piece e shaft. word on the grape vine is im the only person in the uk to use one so no one really knows whats going to happen yet.

 

If your going for 700whp then a S372 will do that at 35psi, and if you want more get the 80mm BW these are impressive turbos and you wont be dissapointed!

 

you aint the only guy dude a few people who dont use the forums have been using them for years

the rw billet shaft is also being used in a few engines from our garage too

advise is sketchy in the uk as many people have not got up near the 700 ukwhp mark and those who have will be reluctant to share all their info.

i can tell you one thing from experience though, rew intakes wont cut the mustard

feel free to pm me on fduk if you need any help

c

 

What were the specs on this car, and boost? Was the mustang dyno @ Joe's shop?

 

+1 on a street port i made 620 on race gas @ 25psi im sure another 10 psi would break the 700 range

 

cheers colum mate yeah ive got the a new intake set up sorted. its pretty amazing to be honest and i cant wait to to send off for it. quite a piece of engineering

yeah info is kind of sketchy in the uk isnt it. seems to be a lot of guessing imo. a lot of people seem to shout that they know, but are actually just guessing or are saying ' what theyve heard' lol