380rwkw R-spec

[blueboost]

3rd is best while low power and torque, but to hard to hook up once the power is this high imo.

the dyno does not realy show the full difference between intercoolers, because you are only taking about 10 sec, to do a run.

if we held it for 30 sec at full power, you would see the benifit of a big intercooler.

that is the highest I have seen on our dyno, with no mod to the turbo (flow wise),on 98octane, but the turbo is out at this power, so the gains are small, when you put larger intake and intercooler on. The real gains are out on the road, where the intake temps are kept lower.

David

Edited 23/06/08 11:13 AM by Dagabond

[2MUCHKW]

Dave I've downloaded this dyno sheet and overlayed mine ... can clearly see now that the Nizpro exhaust turbine housing definitely sacifices a little low end but gives much more top end punch.

Even though my car produces peak power of 378.2rwkw at 174kph which is almost identical things are much different at 200-210kph where I have over 30-35rwkw more then this setup.

Do you have a 15KPH/secUp dyno run of this car?

I dont have a 98ron 20KPH/secUP dyno run to compare with

Edited 23/06/08 12:19 PM by 2MUCHKW

[blueboost]

yeh I have, when I go down the dyno, I might over lay yours and his if you want.

but there is another reason that your car pulled away after peak power I think, and I will try

this before I coment.

David

[TornadoJudd]

very nice Grizzly and Dave!

[2MUCHKW]

Cool ... be good to see a 15KPH/secUp dyno run chart of this car.

What do you think altered the power curves?

Do you think the 3.5" single X-force was restrictive @ the top end compared to the twin 2.5" X-Force system on my car?

I noted fuel was Shell 98ron ... is there any noticable difference over BP ultimate Dave?

[hanra]

Wow, great work David. As Groper mentioned earlier, good to see yet another happy CPV customer.

[blueboost]

  2MUCHKW said:

Cool ... be good to see a 15KPH/secUp dyno run chart of this car.

What do you think altered the power curves?

Do you think the 3.5" single X-force was restrictive @ the top end compared to the twin 2.5" X-Force system on my car?

I noted fuel was Shell 98ron ... is there any noticable difference over BP ultimate Dave?

I will pm you on that, because the difference that yours made is a mod in that tune I think, the base one I used, (you know what I mean) and I don't know if they would like me to tell everyone about it.

no I don't think it is the exhaust or fuel, the cat is the most restrictive part, I think with both gutted, the 3.5 will flow the best.imo

David

[ENVY-T]

Love your work Dave. Well done grizzle guts!!

Awesome having realkws isn't it!

I can see why my mate asks question of you Dave, you know your Tuna from Salmon!

[Fat-Tony]

  blueboost said:

no I don't think it is the exhaust or fuel, the cat is the most restrictive part, I think with both gutted, the 3.5 will flow the best.imo

David

Just by looking at the CFM flow rates of a single 3.5 inch pipe vs a 2.5 inch pipe x 2 the 3.5 inch outflows it easy.

[groper]

no it doesnt...

cross sectional area of 2x 2.5in pipes = 39.25sq inches

cross sectional area or 1x 3.5in pipe = 38.46sq inches

in practice, the single system may flow 'ever so slightly' better due to less surface friction and no y piece.

in reality, its hardly gonna matter in the slightest... and the dyno numbers all over this forum with either system prove they are making around the same power regardless...