427 Solid roller numbers

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Mar 17, 2009 | 07:19 PM

#101

03 BUSA

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From: Kannapolis, NC

I am going to try to set up some time to get back on the dyno and pull the y off and just run open headers to see how much that exhaust is killing me. And while I am at it I want to run the race gas and play with the timing. It is a no brainer that it will make more with higher octane and more timing. I am really concerned with how much the exhaust is effecting my setup. 5-10 hp I am not going to care but if it is 5-10 and pulls to 7k then that is a big deal. And if it is 20-30 more and pulls to 7k then I know where my problem is.

Mar 19, 2009 | 01:22 PM

#102

xfactor_pitbulls

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Run the open headers, but alteast put a 10" extension pipe behind them.

Mar 19, 2009 | 08:26 PM

#103

03 BUSA

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^^^I can do that. What is the benifit of doing that?

Mar 19, 2009 | 09:35 PM

#104

Beaflag VonRathburg

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^ Power and it helps not to kill th O2 sensors.

Mar 20, 2009 | 09:39 AM

#105

ramairws6

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From: Hicksville MN!

They are right but I would at least a 12-18 inch extension to do it right. We have tested this many a times on the dyno and 12-18 is the sweet spot!

Mar 20, 2009 | 05:38 PM

#106

03 BUSA

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Thanks s. I will do that. I am assuming 3"ID pipe for the Kooks"s headers??

Mar 23, 2009 | 04:02 AM

#107

2003cobraH/C

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From: Orange County

Sounds like you have a stout setup ready to breath. Building bad *** engines is all about ballance. Off road y pipes might be great for those little 346's but you have a real healthy 427! The fast might be gagging it a little but not as bad as the y. Also with that compression ratio, and running just 93. Put some race gas in her and crank up that timing. I think you will see 20 plus hp with timing alone going to 28*, and I really have no clue the hp you would gain getting rid of that Y pipe. Let us know how it goes!!! Get that 600rwhp!!!

Mar 23, 2009 | 05:49 PM

#108

03 BUSA

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From: Kannapolis, NC

Plan on true duals this weekend if all goes well.

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Mar 23, 2009 | 05:51 PM

#109

2003cobraH/C

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From: Orange County

sweet that will upppp your power a lot and add some rpm hp up top!!!

Mar 23, 2009 | 06:12 PM

#110

03 BUSA

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From: Kannapolis, NC

^^^That is what I am thinking

Mar 23, 2009 | 07:01 PM

#111

FreakChevy

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cooool

Mar 25, 2009 | 04:44 PM

#112

94 guy

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any updates?

Mar 25, 2009 | 07:20 PM

#113

03 BUSA

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We are going to be trying a 96 mm throttle body and some 3" true duals with some Dynamax bullets. It is supposed to rain for the next couple of days but stay tuned we are working on somethings. I will put down the number we are all looking for here soon. If not I am going to burn this thing. LOL

Mar 25, 2009 | 07:34 PM

#114

94 guy

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you are going to test the tb by itself and then add the exhaust?

Mar 25, 2009 | 07:38 PM

#115

03 BUSA

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^^^NO but we will run it with the new exhaust first and then swap the t body so we will still be able to see the different gains.

Mar 26, 2009 | 06:16 PM

#116

Louis

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From: Frisco/Wylie

Good thread. There is 20-30 rwhp in the exhaust. What MAF is on it?

FWIW, the open headers will make power, but an X setup will pick up the midrange substantially.

Mar 26, 2009 | 08:19 PM

#117

2003cobraH/C

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From: Orange County

its a freggin race car run open exhaust!!! haha. Jk run some cut outs or some true duals like you said. As for the intake fast is just showing their new fast 102 setup. It just might add some more power to your setup, test 'er out!!! And keep us posted good thread.
-Shane