Thread: Where to run crossover pipe?

The one on my Rover SD1 goes along the top of the engine.It joins both sides of the exhaust manifolds together.Although mine is a carby set up so will be different to yours.Are you still going to use the Rover injection set up?

Originally Posted by SPROVER

The one on my Rover SD1 goes along the top of the engine.It joins both sides of the exhaust manifolds together.Although mine is a carby set up so will be different to yours.Are you still going to use the Rover injection set up?

i was hoping you would give me some ideas! thanks for that, i will be using the rover efi manifold but with the throttle body facing in the other direction to accomodate an intercooler, possibly using some larger injectors, running them with the megasquirt, and adapting my lpg vapour injection to the whole lot!

Range Rover 4.4L Turbo Petrol (eBay item 320646430680 end time Feb-01-11 18:31:52 EST)
this rangie is the kind of setup i was initially going for

it will not be pretty, but it will be functional whatever configuration i end up with

i have had another thought, of cutting the y-pipe after it merges, welding on a 180 degree section and sending it back towards the engine bay to feed the turbo, then the exhaust housing can have yet another pipe to connect back to the rest of the exhaust, while it might introduce a bit of lag, it might be worth a try, and might reduce the chance of heat damage to other bits in the engine bay

Yeah i saw that rangie on ebay.Your main problem will be the extra heat in the engine bay from the cross over pipe if you go single set up..Have you thought about going twins instead? I will send you some pics of my set up.Its not pretty either but does the job.

Originally Posted by SPROVER

Yeah i saw that rangie on ebay.Your main problem will be the extra heat in the engine bay from the cross over pipe if you go single set up..Have you thought about going twins instead? I will send you some pics of my set up.Its not pretty either but does the job.

yeah i did consider twins, however i won this on ebay for $120 brand new, so i thought id give it a try

i might just take a punt and try the other thing i came up with, if i keep the piping relatively small pre turbo then it shouldn't affect the driveablity too much

i guess i'll make a decision after i receive the turbo and try to find a place in the engine bay for it

i will be using an external wastegate also, as i want to start with relatively low boost and also because the turbo i bought has no wastegate on it, adapters can be bought to convert it to internal wastegate but then most acuators are 8psi or so

also ive heard that external wastegates, if large enough, control boost better, less spikes etc

Im running an external wastegate on a high comp 3.9 V8 .It originally was running 5 pounds but i changed the spring inside the wastegate to a 9 pound one.Thats about as much boost i can run without an intercooler on a high comp motor.Why dont you find a good second hand 3.9 and put all the goodies on to that? Are you making the exhaust manifolds yourself?

i have a high comp 3.5 im about to replace the cam, lifters, and timing set on, i think ill stick with that for a while, i will be doing all the exhaust work and welding myself, however i think i will just use the stock manifolds and adapt from there

Originally Posted by jazzaD1

i have a high comp 3.5 im about to replace the cam, lifters, and timing set on, i think ill stick with that for a while, i will be doing all the exhaust work and welding myself, however i think i will just use the stock manifolds and adapt from there

The exhaust manifolds on mine are flipped so the turbos would sit high on either side of the engine.When i find some money to go twin turbo i will be using 2 turbos from a Nissan GTST 2.5 These would give good throttle response and hardly any lag.Plus they cost hardly anything to buy secondhand.Have a look at this motor on youtube and how he has set his up.Very nice!

YouTube - Rover Vitesse 1985 - Twin Turbo - 400HP