Headers and legnth of primaries

[1993MTXSHO]

Looking for some input on this. I've tried using calculators but I don't have all the needed info to calculate it. Mainly cam specs of the stage 2.

Oh and I know headers aren't worth it. I'm doing it anyway so no need for those posts haha.

 

[1993MTXSHO]

Here's a good calculator but I don't know all the specs for the cams to fill it out. Does anybody know all those cam specs for the stage 2 cams?

http://www.wallaceracing.com/header_length.php

 

[SHOdded]

Don't know about SHO Shop, but SHO NUT cam specs are here:
http://www.shosource.com/catalog/product_info.php?cPath=61_43_48&products_id=159

 

[1993MTXSHO]

This may be a dumb question but how do I determine the exhaust valve centerline and opening point? Those specs I believe are fairly close to shoshop so should be ok to use if that's the best I can get.

 

[SHOdded]

Won't even pretend to know that stuff. But there are articles on the web that might help, such as this one:
http://www.lunatipower.com/Tech/Cams/CamSpecTerms.aspx
https://www.cartechbooks.com/techtips/camshafts1/

SHO specific quirks?

 

[1993MTXSHO]

I'm going to take a shot in the dark and say maybe a 108 or 109 exhaust valve centerline but I'm really not sure. Hopefully someone with more knowledge will chime in.

 

[1993MTXSHO]

Bump. Anyone? I know SHOSHOP made 2 different designs for their headers. One set had almost a shorty or mid length looking rear header, while the other seemed to have a full long tube that the pipes bent 90 degrees and went straight back. The short tube rear and long tube front setup was always weird to me and I'm wondering what peoples thoughts were on that too. I would expect the engine to not run even on that setup which could be why they redesigned it.

 

[LOUDSHO92]

The shorty design was meant to directly bolt to the y-pipe.

 

[1993MTXSHO]

Yeah catted vs catless. But I'm talking more in terms of performance.

The shorty design was meant to directly bolt to the y-pipe.

Yeah catted vs catless. Have any catless rear headers you want to sell or trade for my catted rear? Haha

I'm probably going to modify the rear header to match the long tube front.

 

[RJ-92]

IIRC, my calculations were around 35" with a 1.75 dia tube for the primaries.