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3.5 with 150 jets?

 
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P100 V8
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Joined: 08 Mar 2011
Posts: 7
Location: southampton


PostPosted: Fri May 13, 2011 7:12 am    Post subject: 3.5 with 150 jets? Reply with quote

I'm currenty running 100 jets and was thinking of changing them to 150 is this wise? The engine is a standard 3.5 9.35 cr with a fast road cam on su's , I'm using a nos foggers on each carb and no controller lack of funds Embarassed Embarassed
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sidecar
Top Dog
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Joined: 04 Feb 2007
Posts: 2299



PostPosted: Fri May 13, 2011 8:46 am    Post subject: Reply with quote

I blew my head gaskets on my 4.6 with just a 115 BHP shot. My system is different to yours and I'm no expert when it comes to NOS so I'll watch this thread with interest!
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dbv8
Knows His Stuff
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Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Mon May 23, 2011 7:59 am    Post subject: Reply with quote

Thats the sort of question only you can answer after running careful plug checks, as you go. If the engine is healthy and strong, fuel supply and spark strength are good then it should be possible.

I do know my 4.6 ran 150 shots many times without issue and dropped my 1/4 from 13.0@107 to 11.6@125.
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mgbv8
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Joined: 18 Nov 2006
Posts: 5326


1975 MG MGB GT V8

PostPosted: Mon May 23, 2011 11:04 am    Post subject: Re: 3.5 with 150 jets? Reply with quote

P100 V8 wrote:
I'm currenty running 100 jets and was thinking of changing them to 150 is this wise? The engine is a standard 3.5 9.35 cr with a fast road cam on su's , I'm using a nos foggers on each carb and no controller lack of funds Embarassed Embarassed


Do you mean 100hp rated jets? I guess these are NOS flare jets yes?

Do you have a bottle heater so you can maintain stable nitrous pressure?

Are you happy that there is enough fuel available for the system?

How much ignition timing do you take out for the 100 shot?

Can you give us the numbers marked on the jets. Fuel and nitrous?

How long have you been running this system?

Regards
Perry
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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