Change in exhaust 620lbs/ft
Change in exhaust 620lbs/ft
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Brummmie

Original Poster:

5,284 posts

250 months

Friday 18th October 2013
quotequote all
I put a H pipe in the exhaust and it dropped from 581 bhp to 565bhp, but torque is up from sub 600lbs, to 620lbs ft, drove it home tonight, and it's got some grunt.. smile the open ITB's sound glorious, will post Dyno later.

BuzzBillsberry

1,306 posts

260 months

Friday 18th October 2013
quotequote all
I'll take Torque over power any day especially up that end of the scale!

Buzz

Brummmie

Original Poster:

5,284 posts

250 months

Saturday 19th October 2013
quotequote all
So mods this time were LS9 supercharger injectors, H pipe, Independant ECU feed via relay to stabalise slight voltage drop at high revs, and Piper cross sock filters, and flip the ITB's 180 so adjustments are not up the bulkhead, i have put a wide band in too to aid setting up on the road...
Here is the Graph, what you cannot see is how smooth the car drives at street speeds, and throttle response is also much crisper, thanks to the new injectors i would say, its up on toerque and power all the way up to 550bhp, and up from around 580lbs/ft to around 620lbs/ft, so 40lbs or so up but down 16bhp at peak.
I think if i want more power i have to go bigger valves and exhaust, but this will mean losses in torque probably and cost around £3.5K, the car is rapid as is, and would only be a wallet busting/scientific experiment as grip is challenging as is! hehe
The main thing is the low running glitch i have suffered this summer, is now sorted and its driving the best ever thumbup


Alexdaredevils

5,697 posts

208 months

Saturday 19th October 2013
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Impressive stuff Paul

See you at the pod later?

GTRene

22,335 posts

253 months

Saturday 19th October 2013
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I guess it will give it another sound too?

is there a before and after sound video clip?

Brummmie

Original Poster:

5,284 posts

250 months

Saturday 19th October 2013
quotequote all
GTRene said:
I guess it will give it another sound too?

is there a before and after sound video clip?
No, i will do in car vid at Silverstone next month, the "open" trumpets are fantastic to listen to when you open it up, but you got to be in it to get the full effect! smile

BuzzBillsberry

1,306 posts

260 months

Saturday 19th October 2013
quotequote all
Great result Paul altho' you need to see a specialist and get your condition treated...biggrinwink I think we had a chat at Chatsworth this year you were telling me what you were hoping to achieve... I knew then you were ill wink

Buzz

snorky

2,322 posts

280 months

Monday 21st October 2013
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"620lbs ft, drove it home tonight, and it's got some grunt."

understatement of the century!

SteveSPG

2,120 posts

231 months

Monday 21st October 2013
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from the graph, at least 450 ftlb at 1500 rpm. bonkers


db484bhpv8

8,676 posts

249 months

Monday 21st October 2013
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You missed a great day at the pod Paul. The weather was perfect, only TVRs were allowed on track.
They had topless models as marshalls and everyone was given free champagne and all the chips you could eat.
Eveyone ran PB after PB and went home very happy.

Some of the above may have been made up rolleyes
smile

Brummmie

Original Poster:

5,284 posts

250 months

Monday 21st October 2013
quotequote all
db484bhpv8 said:
You missed a great day at the pod Paul. The weather was perfect, only TVRs were allowed on track.
They had topless models as marshalls and everyone was given free champagne and all the chips you could eat.
Eveyone ran PB after PB and went home very happy.

Some of the above may have been made up rolleyes
smile
I have a trackday all booked and paid for on the 16th at Silverstone, so i will be doing that, did not want to risk busting something.
Next year i will raise the bar with a 10.4x, no joke.. smile

neal1980

2,584 posts

268 months

Tuesday 22nd October 2013
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Brummmie said:
Next year i will raise the bar with a 10.4x, no joke.. smile
tell us more......

db484bhpv8

8,676 posts

249 months

Tuesday 22nd October 2013
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neal1980 said:
tell us more......
NOS laugh

Brummmie

Original Poster:

5,284 posts

250 months

Tuesday 22nd October 2013
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I have a clutch that works!

tvrolet

4,745 posts

311 months

Tuesday 22nd October 2013
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Brummmie said:
I put a H pipe in the exhaust and it dropped from 581 bhp to 565bhp, but torque is up from sub 600lbs, to 620lbs ft, drove it home tonight, and it's got some grunt.. smile the open ITB's sound glorious, will post Dyno later.
Pah, mine made 630 smile

...but I do lust after the throttle bodies.