Choice of turbos

[ArnieVXR]

Not quite for drag racing (well not yet anyway), but...

Looking at a pair of turbos for a high-spec LSX427 SBC. Going to be run on street gas, but want to push well into the 1000+hp.

Been offered GT35-Rs and Borg Warner S300 or S400. All and any views appreciate...

[redvictor]

ArnieVXR said:

Not quite for drag racing (well not yet anyway), but...

Looking at a pair of turbos for a high-spec LSX427 SBC. Going to be run on street gas, but want to push well into the 1000+hp.

Been offered GT35-Rs and Borg Warner S300 or S400. All and any views appreciate...

s400 will be too big for your goal.Spool up will take to long for sensible road use.
65 to 70mm size turbos would be good. If the gt35 or s300 are close to this then go for them. They will achieve well over your 1000hp goal.
BW is a very good long lasting turbo too..

[Boosted LS1]

Gt 35's for appx 800 hp with fast spool or gt37's for a tad over 1000 hp. Flow charts are your friend

[ArnieVXR]

Thanks guys - guess I'll be going BW S300 then

[rserob]

surely a single 88mm would also support the same power levels... many have managed around the 1200hp mark with a GTB88 on a SBC.
would think this also saves weight and space.

[ArnieVXR]

It's been a while, but the (BW S300) turbos are finally in place and happily running to 17psi. Currently limiting factor is the injectors (96lb). I'm not sure how much more puff the turbos have:

[Jim Campbell]

ArnieVXR said:

It's been a while, but the (BW S300) turbos are finally in place and happily running to 17psi. Currently limiting factor is the injectors (96lb). I'm not sure how much more puff the turbos have:

Engine dyno? Fuel? Comp ratio? What's the donk going in? Full turbo specs please. Oh and well done

Ta

[ArnieVXR]

Jim Campbell said:

Engine dyno? Fuel? Comp ratio? What's the donk going in? Full turbo specs please. Oh and well done

Ta

John Sleath's engine dyno
1:8.5
97-ron fuel (Shell v-power)
Borg Warner s300 turbos (DC 55 stamped on them - quite small - running flat out)
It's going in my street legal Vauxhall Monaro VXR and will be used for RWYB and standing mile events. Looks very standard, though will have the rear modified by John to ensure that the power actually reaches the road.

[Jim Campbell]

Very nice! What's your goal for the build then? 9sec quarter and a 200mph mile?

Ta

[ArnieVXR]

Nine seconds would be very nice for a road car (okay on drag radials) and 210mph would be nice on the mile (there's a guy pushing 900bhp in a Monaro that tops 200mph). After that, I'm keen to go baiting supercars...