Twin turboing a 3.5 V8 sd1

[All Terrain]

simply is it possible? If so what needs to be done?
Eg compression ratios new pistons yadda yadda yadda.

would the Garrett turbo from a landy 300tdi work? (obviously x2)

Just a nutty notion of mine!

PS How hard is it to rebuild a 3.5? I may be able to get one for 150 or under, but I'm wondering if its worth it, because an old v8 can be mullered.

>>> Edited by All Terrain on Saturday 28th June 17:07

[schueymcfee]

You tried this site, its about supercharging the SD1 but some of the problems he encountered are interesting.

www.geocities.com/MotorCity/Show/2505/

[deltaf]

Most things are possible given enough time and money. Live the dream!

[eliotmansfield]

You'll want an old low compression 3.5 rover lump (about 8.5:1 i think), then re-build it.
Then there's all the plumbing, jetting and heat to get rid off.
May be better to get a tidy 4.2 rover lump, and forget the turbos

[All Terrain]

Well I May Be able to get this one quite cheap. It Also needs to be SD1 because of insrance or somthing. Not sure what the compression is, but its probably going to need new pistons anyhow, so I can make it what I want. The problem of detonation from the charger.... If I am running turbos, and fit decent intercoolers, would that be sufficient to cool the charge enough from when it gets compressed?

Looked a bit of a nadger basher to me. Oh well Should prove intresting when in. (mpg is pretty poor tho!)

[boosted ls1]

You can use forced induction for up to 9:1 c/r with a simple water injection set up and up to 9 psi boost. I've done it with a 4.5 & 5.0. It's easy to do with a 4 barrel holley, rising rate regulator and a 12psi pump appx. The key component is the exhaust manifolds. You can use t3/t34's or rotomaster T04B's. By coincidence, I have some second hand manifolds here if your interested.

[All Terrain]

I may well be. Do you use msn messenger perchance? I don't mind peple knowing my address, so if you want to add me feel free. [e-mail] .

I dont particularly want to use water. And Its a carbed engine from what I gather. I'm doing this as a sort of project, which will help woth my desired Uni choice of Motorsport engineering. I think the LR 300tdi turbo is a G3. I only really understand TDi's, so any help on the carbed petrol front is MASIVELY appreciated.
Many thanks!
AT

>> Edited by All Terrain on Sunday 29th June 21:25

[kstead]

Hope nobody minds me butting in but I was thinking that diesels dont use a waste gate? could be wrong here. Also you need to suck through or blow through the carbs, if you blow through you need to pressurise the float chambers as well which could be tricky as it needs to be slightly more than the boost so it goes a bit richer. Floats need to be foam filled so they dont collaps to. If you suck through the turbo spins the fuel out of the mixture and I dont think an intercooler helps with this so not a good idea to use them on suck through. learntthisshityearsagoanforgotnow
keith

[All Terrain]

Yer I was Thinking about the difficulties of turboing a carb. Maybe injection is the way to go. I want to stay away from ecus etc though!

[kstead]

Idea for you, r5 GT turbo uses carbs, Im sure two of those would provide enough flow, get a haynes manual for one to see what the set up is. Just a thought.

[deltaf]

Hmmm 1.4+1.4=2.8......renault carbs aint gonna cut the mustard.
Go for fuel injection.
Its far more tunable than a carb can ever be, and if you modify the spec of the engine later its just a matter of having it tweaked by a knowlegable tuner.
Carbs are for the dinosaurs......lol.

[All Terrain]

Yes they are but they are simple like me.
If the engine is carbed how do I set about getting it to be injection? Is it somthing like steal a head from a later engine and plonk it on? This is getting closer to a nogo every minute.

[boosted ls1]

kstead said:

Hope nobody minds me butting in but I was thinking that diesels dont use a waste gate? could be wrong here. Also you need to suck through or blow through the carbs, if you blow through you need to pressurise the float chambers as well which could be tricky as it needs to be slightly more than the boost so it goes a bit richer. Floats need to be foam filled so they dont collaps to. If you suck through the turbo spins the fuel out of the mixture and I dont think an intercooler helps with this so not a good idea to use them on suck through. learntthisshityearsagoanforgotnow keith

Not always that bad! If you pressurised the float chambers without boost referencing the rising rate regulator the fuel would be forced back towards the tank so it would go lean. You can boost a holley to 10 psi without any problems. A plenum on top also seals the float bowl vents so if done properly the float bowl will not see a pressure change. The floats can easily take that but holley being good as sellers also provide uprated floats just in case you want them! As for full boost jetting then just jet the carb as normal on a rolling road. Blow through is much better then suck through for obvious reasons and whilst efi is superior a carb can be a lot of fun and it will still be very fast. The compression will determine how much boost you can use. Even 3psi on an RV8 is a big improvement. Expect a slight weep of fuel from around the throttle shafts. There is a 'fix' but the weep is so slight it's not a major problem.

[kstead]

Think power not engine size, I'm told R5s can go to 160bhp plus on standard carbs x2 320bhp. At a guess they should be plentiful in scrapyards after the max power boys have finished doing donuts in them (bless)and if you can get the whole car you get intercoolers, fuel pumps, hoses and all the nuts and bolts you need for a project like this.

[deltaf]

Would that be a maxxed to the gunnels, full 'O' ice and slammed to the deck R5?
Or just some rudeboy's hallucination?

[GreenV8S]

Would have thought a pair of HIF6 SUs would be perfect, also very cheap. Just need to pressurize the float chamber - which is easy peasy compared to the rest of the turbo installation.

[annodomini2]

what you need for electronic injection (generally!) ECU obviously, injectors, throttle bodies, fuel rail(s), air temperature and pressure sensors, coolant temperature sensors, crank sensor, (turbocharged) boost sensor & throttle position sensor. they're the basics, depending on the ecu configuration. others can include, vehicle speed, fuel pressure, knock sensor etc etc etc!

Injection will give you the chance to get a better setup once you've paid the initial cost, but its that initial cost. Plus if you make any engine changes or want to raise the boost then, the rework to the fuelling system, is usually less than with a carb system.

Carbs, suck through is a simpler setup, but you need good turbos. Blow through gives you more options intercoolers, nitrous etc. but the carb must be able to handle the boost!

[All Terrain]

what about non ecu injection? My 300tdi has no pooters, yet is an injection engine.

[deltaf]

Mechanical fuel injection....
You could possibly use the old K-jetronic injection system off of an audi 200 5T...they're purely hydromechanical injection..no pooters.
Finding one ? nah not worth the effort...in any case a nice ecu will do you fine...unless ya really fancy a carb? lol

[All Terrain]

well its going to come down to cost in the end. I think turboing onto a carb will be "the best" option. I dont think mpg is going to be an issue because no one will insure me on the damn thing.