Twin Turbo conversion
Discussion
I've been putting this post off for a long time, now its all coming together I thought it about time to share!
We stared with a 4.6 crank and block then added custom made rods and pistons, 96mm bore tophat liners and a custom grind cam from crower to create a 4.8 with 7:1compression, ARP Bolts and studs through out, I already had V8 Developments stage 3 heads and 45mm inlet manifold and 72mm plenum.
We went for a lighter less cluttered front end setup so I got hold of a preserp swirl pot, alternator bracket and with the v8s manifolds and custom swan neck turbo link pipes, the turbos ( gt28rs) could be mounted so every thing looked equal and symmetrical
After much deliberation a decision was made to stick with the T5 and had the uprated quaife wide ratio internals as this was being used on cars with 800hp (as I was informed by Bernie at CTS, although he wouldn't commit to a maximum torque figure). I have acuired a 3.9 GKN dif so i have a choice of final drives and will be getting the uprated drive shafts from Dave mac
Then I looked long and hard for a clutch and flywheel that would be up to the job, I decided on a Mcleod RST twin plate clutch and an sfi rated mcleod FW again good for 800 ponies but with a near to standard pedal feel that wasn't on and off like the high HP paddle clutches.
As for the stopping power I went for the 322mm disks from a tuscan s with TVR calipers and 5 stud hub conversion but this is sitting on my garage floor waiting to be fitted, shocks are Gaz gold pros with uprated springs, and will be sitting on 18" spiders at least until I can decide on what else I like!
Corillo rods and Ross pistons ceramic coated and total seal rings
96mm tophat liners in a cross bolted block
4.6 Crank rods ARP studs and bolts
2 Garrett GT28rs turbos with swan neck link pipes connected by V8s manifolds
Turbo trial fit to build link pipes and Y piece
Mcleod clutch pack
In the test bed with carbs fitted to bed the Cam in
Aeroquip Turbo drains in the sump
The Engine in it's final form with RC racing 60lb injectors, tufftriding to all the linkage and fuel rail, and stainless bolts throughout,and powder coating to almost everything
We stared with a 4.6 crank and block then added custom made rods and pistons, 96mm bore tophat liners and a custom grind cam from crower to create a 4.8 with 7:1compression, ARP Bolts and studs through out, I already had V8 Developments stage 3 heads and 45mm inlet manifold and 72mm plenum.
We went for a lighter less cluttered front end setup so I got hold of a preserp swirl pot, alternator bracket and with the v8s manifolds and custom swan neck turbo link pipes, the turbos ( gt28rs) could be mounted so every thing looked equal and symmetrical
After much deliberation a decision was made to stick with the T5 and had the uprated quaife wide ratio internals as this was being used on cars with 800hp (as I was informed by Bernie at CTS, although he wouldn't commit to a maximum torque figure). I have acuired a 3.9 GKN dif so i have a choice of final drives and will be getting the uprated drive shafts from Dave mac
Then I looked long and hard for a clutch and flywheel that would be up to the job, I decided on a Mcleod RST twin plate clutch and an sfi rated mcleod FW again good for 800 ponies but with a near to standard pedal feel that wasn't on and off like the high HP paddle clutches.
As for the stopping power I went for the 322mm disks from a tuscan s with TVR calipers and 5 stud hub conversion but this is sitting on my garage floor waiting to be fitted, shocks are Gaz gold pros with uprated springs, and will be sitting on 18" spiders at least until I can decide on what else I like!
Corillo rods and Ross pistons ceramic coated and total seal rings
96mm tophat liners in a cross bolted block
4.6 Crank rods ARP studs and bolts
2 Garrett GT28rs turbos with swan neck link pipes connected by V8s manifolds
Turbo trial fit to build link pipes and Y piece
Mcleod clutch pack
In the test bed with carbs fitted to bed the Cam in
Aeroquip Turbo drains in the sump
The Engine in it's final form with RC racing 60lb injectors, tufftriding to all the linkage and fuel rail, and stainless bolts throughout,and powder coating to almost everything
Edited by slideways on Saturday 10th March 18:37
Edited by slideways on Tuesday 24th April 02:07
Edited by slideways on Thursday 26th July 20:22
Pupp said:
Really liking the look of this.... how are you going to keep on top of detonation and temperature control? Any worries about mounting the blowers on stainless? Was warned off doing this but so want it to work...
Temp control via a very large intercooler not made yet! and probably water injection when on full chat, DTA p8 pro ecu running the igintion and fuelling, we have low compression and are going to run about 15psi to start with we're aiming for 600 horsesthe headers and link pipes are mild steel the rest is stainless so we'll see what happens
Edited by slideways on Saturday 26th March 22:41
neal1980 said:
Looking good Richard 
Cant wait to see / hear this one...Get your finger out Chatsworth aint far away now
Your ordered your water injection yet?? Ive gotta soon maybe a deal somewhere.
Neal
unfortunately my fingers aren't in...so i have no control over time scale, I definitely wont make chatsworth in the Chim if I'm not at work I might try and get down anyway,Cant wait to see / hear this one...Get your finger out Chatsworth aint far away now
Your ordered your water injection yet?? Ive gotta soon maybe a deal somewhere.
Neal
what WI system are you looking at?
slideways said:
unfortunately my fingers aren't in...so i have no control over time scale, I definitely wont make chatsworth in the Chim if I'm not at work I might try and get down anyway,
what WI system are you looking at?
Wanted to use the Snow performance stuff from America. But the new Aquamist range looks like its moved on a fait bit so now im stumped again!..what WI system are you looking at?
neal1980 said:
Wanted to use the Snow performance stuff from America. But the new Aquamist range looks like its moved on a fait bit so now im stumped again!..
I have to agree with you on the aqua mist stuff it looks much more professional. pricey though!This is a good read
CLICKY
Edited by slideways on Sunday 27th March 20:42
Cool, very cool and look forward to seeing it at the 'pod'. 
dbv8 said:
looks like they forgot the intercooler, It would be nice to think it could be done that cheaply but you get what you pay for, as they sayEdited by slideways on Monday 28th March 10:44
slideways said:
Temp control via a very large intercooler not made yet! and probably water injection when on full chat, DTA p8 pro ecu running the igintion and fuelling, we have low compression and are going to run about 15psi to start with we're aiming for 600 horses
the headers and link pipes are mild steel the rest is stainless so we'll see what happens
Never mind the horses whats the torque going to be like ???the headers and link pipes are mild steel the rest is stainless so we'll see what happens
Edited by slideways on Saturday 26th March 22:41
slideways said:
hiltonig said:
Never mind the horses whats the torque going to be like ???
Don't Know exactly, but have been told it will be similar to to the HP figureEasily fixed with a little of you know what if it becomes an issue
dbv8 said:
I am interested to see if there is a significant dip at low to midrange.
Easily fixed with a little of you know what if it becomes an issue
we'll have to wait and see!Easily fixed with a little of you know what if it becomes an issue
The engine got fired up for the first time on monday and i was told it started first time and every thing seemed ok
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