1 7/8 headers w/ merge collectors
#1
1 7/8 headers w/ merge collectors
I will be doing a monster cam that favors
the exhaust side.
My Question-
Is there any loss going to a full 1 7/8"
(with race merge collector)as opposed to
1 3/4 with full race merge collector?
It will be a dual exhaust with Borla XR-1's
almost directly off the header with dumps(all 3")
I will probably go with QTP's.
I haven't ruled out stepped headers,either.
I'm open for opinions. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Thanks,
Sean
the exhaust side.
My Question-
Is there any loss going to a full 1 7/8"
(with race merge collector)as opposed to
1 3/4 with full race merge collector?
It will be a dual exhaust with Borla XR-1's
almost directly off the header with dumps(all 3")
I will probably go with QTP's.
I haven't ruled out stepped headers,either.
I'm open for opinions. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Thanks,
Sean
#4
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Re: 1 7/8 headers w/ merge collectors
Id say you may loose some low end torque. If you car is gonna live in the upper RPM range, they may work well for you. I remember reading JS actually made less power with his Dynatech stepped headers than his MAcs. Do you homework, they may be better suited for a stroker than a stocked cubed motor.
#6
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Re: 1 7/8 headers w/ merge collectors
Sean, first off, sorry we never got back to you- Jason ended up with the wrong valve seals, so that stopped our cam swap- but check out bigSS' updated numbers in the internal section <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Next- Mirror Jasons setup- Non stepped, 1.75 dynatechs, Stainless merges, and an ORY pipe ( for you, setup your exhaust after the collector like you said above). I put that on his car friday night. I will have the cam in wednesday and we will see how it does that weekend <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
If it makes good power, there is your setup, if not, well, we wont have to worry about that <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
FWIW, bigSS is looking into exactly what you speak of. Whats your time frame here on this project? <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Next- Mirror Jasons setup- Non stepped, 1.75 dynatechs, Stainless merges, and an ORY pipe ( for you, setup your exhaust after the collector like you said above). I put that on his car friday night. I will have the cam in wednesday and we will see how it does that weekend <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
If it makes good power, there is your setup, if not, well, we wont have to worry about that <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
FWIW, bigSS is looking into exactly what you speak of. Whats your time frame here on this project? <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
#7
Re: 1 7/8 headers w/ merge collectors
Early april.
My car goes in for the cage March 21st.
When it comes back...it's power time!
I'll put the cam in and dyno with the exhaust
I have on now.(with tuning)
Put the new exhaust on and redyno.
I sent your Dad a similar/related e-mail,but haven't
heard from him.
I like the QTP headers,have you checked them out?
Alex has some DAMN nice numbers.
I plan to hit over 420rwhp-G5X-2.
Everyone always doubts me,I always prove 'em wrong. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<small>[ March 09, 2003, 06:18 PM: Message edited by: 01-Z ]</small>
My car goes in for the cage March 21st.
When it comes back...it's power time!
I'll put the cam in and dyno with the exhaust
I have on now.(with tuning)
Put the new exhaust on and redyno.
I sent your Dad a similar/related e-mail,but haven't
heard from him.
I like the QTP headers,have you checked them out?
Alex has some DAMN nice numbers.
I plan to hit over 420rwhp-G5X-2.
Everyone always doubts me,I always prove 'em wrong. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<small>[ March 09, 2003, 06:18 PM: Message edited by: 01-Z ]</small>
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#11
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Re: 1 7/8 headers w/ merge collectors
Do Kooks straight 1 7/8 with merged collectors. Kooks has a cool semi-merge, but since you wont have a Y or crossover, a real merge is the ticket.
is this moster cam around 232/240?
is this moster cam around 232/240?
#12
Re: 1 7/8 headers w/ merge collectors
I have to check on Kook's stuff.
Is it good stuff?
232/240...that's awefully big...hmmm..I don't know. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Is it good stuff?
232/240...that's awefully big...hmmm..I don't know. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
#16
Re: 1 7/8 headers w/ merge collectors
I don't think they do,but I'm not sure.
I'm starting to think a stepped header would
work better.
But I'm keeping in mind future progress.
(N2O,heads,cubes,ect.)
C'mon people!Let's hear it!
What's the best Drag racing header?
I'm starting to think a stepped header would
work better.
But I'm keeping in mind future progress.
(N2O,heads,cubes,ect.)
C'mon people!Let's hear it!
What's the best Drag racing header?
#17
#20
Re: 1 7/8 headers w/ merge collectors
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 01-Z:
<strong> Alex has some DAMN nice numbers.
I plan to hit over 420rwhp-G5X-2.
Everyone always doubts me,I always prove 'em wrong. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">After seeing what my car did, I have no reason to doubt you'd get 420rwhp. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<strong> Alex has some DAMN nice numbers.
I plan to hit over 420rwhp-G5X-2.
Everyone always doubts me,I always prove 'em wrong. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">After seeing what my car did, I have no reason to doubt you'd get 420rwhp. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />