View Full Version : I have some questions about turbo convertions.
Yamaha_YzF-R1
29-08-2007, 19:09
Hello from Bulgaria :) I have a couple of questions that need answering and I will be glad if you could help me :). I have a friend with a Clio 1.8 16V F7P 720 engine who wants to put a turbo and performance camshafts - what's the best turbo setup for the car? And with it aproximetly how much HP will it gain? What times will it do on a 400m drag? Will it be nessecary to do something with the head peace?
depends on low or high compression turbo conversion.
a T28 and standard compression about 200/220bhp.
a GT28RS and low compression 8.5 to 1. between 250 and 400bhp.
head needs no modification but will benefit from gas flowing.
not sure on the drag times as i,ve yet to run it up the strip.
ps. there a turbo engine for sale. 250bhp. 3000 pounds sterling.
Yamaha_YzF-R1
30-08-2007, 22:27
depends on low or high compression turbo conversion.
a T28 and standard compression about 200/220bhp.
a GT28RS and low compression 8.5 to 1. between 250 and 400bhp.
head needs no modification but will benefit from gas flowing.
not sure on the drag times as i,ve yet to run it up the strip.
My friend wants to know what do you mean by "standard compression" ?
And with this standard compression could he put performance camshafts from pipercams?
standard means the pistons as they are now. 9.5/10 to 1 compression.
yes you can fit piper cams on these.
Yamaha_YzF-R1
30-08-2007, 22:45
What about the head gasket? is it the normal one or he has to get a special one?
Yamaha_YzF-R1
30-08-2007, 22:53
I forgot to mention - Is it nessecary to make any changes on the fuel line? I'm talking about the fuel injectors, the fuel pump. Olso what kind of spark plugs are used, intercooler etc. What diameter exhaust is nessecary to use and the mufler too. Well this is it for now :)
i use a sepresso head gasket can get different thickness.
yes use renault 21 turbo injectors and map sensors. uprated fuel pump.
running the ngk bcr8es plugs.
using a pace charge cooler system.
running a two inch mongoose system.
No you don't. You use a Spesso gasket :P
1, 2 & 3. Intercooler
4 & 5 Chargecooler
well close i was. i run standard gaskets and wire ringed block
Yamaha_YzF-R1
31-08-2007, 09:30
well close i was. i run standard gaskets and wire ringed block
I can't quite understand the phrase "wire ringed block" - could you describe it pls :)
MAXIBOY do you have any parts for the turbo converssion for sale?
wire ringing the block means cutting grooves around the cylinders in the block face and then feeding copper wire in these so that it sits just proud and bites into the head gasket fire ring
http://i36.photobucket.com/albums/e15/123maxiboy/DSCF4098.jpg
as above. increase the sealing above that of a normal gasket and in most cases better than a competition head gasket.
no i don,t have parts for sale but think stan has a turbo manifold for sale and gunner and lewiswilly have parts and tony selling a complete turbo engine for a bargain 3000 pounds. plus theres a set of low comp turbo pistons for sale for 400.
I would just like to point out that a T28 will easily maintain 15psi and can stay at 17psi if needed (but that's about it's limit). You can get between 280-310 on the T28 (this based on the Nissan SR20DET engine though).
GT28RS will be 'necessary' for above 310bhp really. It is also ball bearing turbo so spins up faster unlike the C-type sleeve bearing on the 'standard' T28.
As a side note, a much cheaper option is the GT28R turbo which is ball bearing and will be good for around 330bhp but performs much better than the standard T28 thanks to the ball bearing and other slight modifications. Can't take it as far as with the RS, but above 300 you've really got to consider the affect of a massive torque spike on a FWD car.
Matthew
Yamaha_YzF-R1
31-08-2007, 10:52
I see now, the wire thing is very clever and very neat :)
Chet T16
31-08-2007, 11:00
The manifold stan has is mine, i think its sold tho
PM me
Yamaha_YzF-R1
31-08-2007, 11:01
I would just like to point out that a T28 will easily maintain 15psi and can stay at 17psi if needed (but that's about it's limit). You can get between 280-310 on the T28 (this based on the Nissan SR20DET engine though).
GT28RS will be 'necessary' for above 310bhp really. It is also ball bearing turbo so spins up faster unlike the C-type sleeve bearing on the 'standard' T28.
As a side note, a much cheaper option is the GT28R turbo which is ball bearing and will be good for around 330bhp but performs much better than the standard T28 thanks to the ball bearing and other slight modifications. Can't take it as far as with the RS, but above 300 you've really got to consider the affect of a massive torque spike on a FWD car.
Matthew
My friend isn't so greedy ;) he wants around 200-220 hp but probably without changing the compression and the pistons because it's too expensive for him. And yes you are right, so much power on a fwd car isn't nessecary - I know a guy in my city who has a opel calibra and he turbo converted it to about 300-350 hp and he says that it's almost imposible to make a fast start with it - even in 3rd and 4th gear it burns the wheels
mine has a lsd and i have no trouble with my starts. thats what the throttles for.
Yamaha_YzF-R1
31-08-2007, 11:37
lsd?
limited slip differential in the gearbox for helping to get the power down by limiting wheel spin.
lewis_willy2
01-09-2007, 02:30
im running, forged low comp pistons, standard size but uprated gasket and standard bottom end, apart from new bearings. and a good ol clean up...
hopefully, from what i have heard there is a 320bhp chip about. gonna be madness running 1.5 bar, havent got lsd tho so a start off from the line will be slippy but, williams turbo..... gonna rock.
wait till i figure out how it goes in the boot :twisted:
Yamaha_YzF-R1
01-09-2007, 08:28
Damn! 1.5 bar on a williams? you're insane man :)
Yamaha_YzF-R1
01-09-2007, 13:35
My friend wants to know where's the horsepower limit of the gearbox and clurch?
standard clutch is made of cheese, you will kill it with any turbo aplication, uprated clutch is good for around 250bhp and the same torque in lb/ft but i'm running that with that power and its not going to last! :twisted: best of with a paddle clutch kit, thats good to over 400bhp i think. std gearbox of a valver if newish should be good to 350bhp, williams bit more maybe but again dont expect them to last too long. :P
Yamaha_YzF-R1
01-09-2007, 13:51
MAXIBOY, my friend was looking thru your gallery and he saw that your camshafts are diffrent - what are they?
BGHayabusa
01-09-2007, 14:15
hello, I'm the dude that this is all about :) After numerous tries of registration finally I made it :) Thanks for all the replies mates!! :lol:
Yamaha_YzF-R1
01-09-2007, 14:16
Yup, this si the guy for whom I was asking things ;)
welcome!
I believe Neil (maxiboy) is running some piper turbo spec cams, or they may be catcams, either way am sure he'll elt u know asap!
yes mate there a set of custom piper cams with high lift and short duration designed to meet my spec.
was thinking of going wilder but may not need too if fisrt indications are anything to go by.
Crossers
01-09-2007, 22:55
i use a sepresso head gasket can get different thickness.
yes use renault 21 turbo injectors and map sensors. uprated fuel pump.
running the ngk bcr8es plugs.
using a pace charge cooler system.
running a two inch mongoose system.
Are they not bike plugs?
Paul
supplied in my turbo kit. run colder than the normal 6,s
Crossers
02-09-2007, 01:09
Ah right, i'll order them then. BB take the piss, £30 notes for 4...they're only £1.75 each!
Paul
there in business i suppose. takes you money makes your choice.
got mine for a quid each.
So whats the limits to standard pistons and rods on a conversion?
stand pistons are only good for 220bhp as there the wrong compression ratio really. rods around the 300bhp mark.
Just coming back to this thread and noticed about the t28 and standard compression. I said really need a better than t28 after 310bhp-ish. What I failed to see was that the 220-220 was at standard compression.
A standard T28 will still be fine upto about 290-310, but on a lower compression engine. The gt28rs (there are many turbos to chose however) will only really be required if you want a quicker spool up time and higher than 310bhp. You can pick up 2nd hand T28's very cheap if you look around. They will hold about 17psi comfortably.
Matthew
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