Exhaust Exit Route
Discussion
Does anyone have any experience of routing exhausts to the underside of a GTR with a complete flat floor and rear diffuser? Due to a rather unforeseen LS7 replacement to an LS9 TT, I'm wondering about venting the exhausts underneath to hopefully increase downforce and allow me to use the exhaust space to direct air through the charge cooling system. Sounds a good idea in theory but unsure of complications, which will become more obvious once the engine is back and in situ.
Yes it is my old car (not that there was a huge amount left), which was transformed into the TA car, I've already spoken to SS about it, and he was fairly positive about the concept, as it should increase downforce.....in theory, and I'd get his input anyway before doing anything to damage the aero built in.
The car was rebuilt following my crash with it, for Stuart, PK LS7 built to 700hp, but then detuned at some point to 640, not quite sure why, maybe driveability? Then went on to Martin followed by Andrew the "airforce guy". I got it back in Jan this year, hoping to track it including a 2 day event at the ring, but the LS7 imploded, dropping a hydraulic lifter which did a fair bit of damage around the engine, combined with some fairly rubbish signs of wear, resulting in a new engine being needed. So, hopefully there will be a new powerplant within the next 4-5 weeks, giving me most of the winter to map and sort the car. What else is needed apart from pics??? wait until engine back 
75% of side pods used for AC and oil cooler, need exit route for heat exchanger /chargecooler for intake, so was thinking of rerouting exhausts to reduce heat in engine bay and use vents at rear of clam for air flow through HEs. If the exhausts vented underneath it should help airflow via diffuser to increase downforce courtesy of Mr Bernoulli. The vertical route suggested looks great but would not help downforce, and could interfere with aero from rear wing. All suggestions are welcome as there is plenty of scope for change.
I have changed the oil cooling set up to a laminova cooler that you can fit in a smaller space and doesn't need air flow around it, mines down low between the engine and fuel tank. I have had to change the layout of the engine cooling pipe work but this free's up the space for charge cooler radiator and fan in the side pod and should leave plenty of space for the floor mounted exhausts. Only just got my engine running so can't comment on how effective this modification is.
Good Luck
Good Luck
xrtim said:
I have changed the oil cooling set up to a laminova cooler that you can fit in a smaller space and doesn't need air flow around it, mines down low between the engine and fuel tank. I have had to change the layout of the engine cooling pipe work but this free's up the space for charge cooler radiator and fan in the side pod and should leave plenty of space for the floor mounted exhausts. Only just got my engine running so can't comment on how effective this modification is.
Good Luck
My LS7 came with an oil-over-water oil cooler fitted to the side of the engine which I used instead. It has proved trouble free and I have not had cooling issues.Good Luck
P
Thevet said:
The car was rebuilt following my crash with it, for Stuart, PK LS7 built to 700hp, but then detuned at some point to 640, not quite sure why, maybe driveability? Then went on to Martin followed by Andrew the "airforce guy". I got it back in Jan this year, hoping to track it including a 2 day event at the ring, but the LS7 imploded, dropping a hydraulic lifter which did a fair bit of damage around the engine, combined with some fairly rubbish signs of wear, resulting in a new engine being needed. So, hopefully there will be a new powerplant within the next 4-5 weeks, giving me most of the winter to map and sort the car. What else is needed apart from pics??? wait until engine back
wow things move quickly... spent aload of time working on that car with martin,,, we made a few mods too.. yess detuned as 700 was too peaky wouldnt idle,,, much easier to drive after.i nearly bought it off martin but couldnt fit in the driever seat,, great car,,, imo the exhaust will be too hot.... car too low.. in traffic diffuser will melt
great car,,, loved every minute working and being in it,,, great its in great hands, i have huge photo history of it somewhere
Hi Dom,
if you have any photos above the build cd of maybe 100 pics, I'd be very interested to see them.
As regards the exhaust, it's probably going to have to be a standard route but ceramic coat to keep heat under control for general under hood and intake temps given that it is going to be a TT motor. Arrival of the said unit is keenly awaited
if you have any photos above the build cd of maybe 100 pics, I'd be very interested to see them.
As regards the exhaust, it's probably going to have to be a standard route but ceramic coat to keep heat under control for general under hood and intake temps given that it is going to be a TT motor. Arrival of the said unit is keenly awaited
That would be great, the TA GTR is undergoing a heart transplant from the LS7 it came with, failed lifter and excessive engine wear required a new heart. I was surprised to hear from the engine builder that he only expected 10k miles max before rebuild would be needed. I guess that high tune LS7s will need high maintenance, the replacement should be better but i hope the mistake won't be repeated, with care about warm up and run in high on my list. As the power should be close to 800-850hp there may be a case for gearbox change to a sequential box (albins?) in the future but that will have to wait for now. The general appearance will change as wrapping will be applied to a slightly tired gelcoat, but the colour strip is open to debate......suggestions welcome.
Gassing Station | Ultima | Top of Page | What's New | My Stuff