porting stock intake manifold and stock heads?

Thumper has been porting stock heads for many years with very good results.

http://www.thumperoforangepark.com/

Tmoss has been porting lower stock intakes for several years with dyno proven results. Do a search on tmoss for more info on the lowers

and the HP increase estimate depending on my sig

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Very good chance I'll have dyno numbers for heavily ported stock heads (stock vlvs) and stock lower intake along with;

stock cam
1 5/8" shorties
2 1/2" OR H
2 1/2" summit cat back
3.73s
65mm TB & Egr
stock MAF
3" intake elbow

in early Oct. if you can wait.

Here's another home porting reference....

http://www.cmc.net/~xero/Mousesporting.html

Search around - fella just posted that he used this guide to home port his GT40P's and got very nice numbers out of them. tmoss can do the port job for you on the stock lower manifold - to really make it work well, some welding is required on the backside of the dogleg in the #1 and 5 runners I believe. Best left to Tmoss.

I did a home port job on my stock heads and stock lower and upper intake. Those were also my first attept at porting and after doing that it took my old 87 GT Convert from a 14.0 at 97 mph to a 13.6 at 99 mph.

Power302 - that equates to "about" a 40HP increase, nice work for a first timer!

Another link:

http://members.shaw.ca/puzeym/head_port/head_port1.html

tmoss said:

Power302 - that equates to "about" a 40HP increase, nice work for a first timer!

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Thanks, But, I though going from a 97mph to a 99mph trap was only about 20 hp or so. I was told about 10 hp for every 1 mph (round about). The Et. was from it getting a little better 60ft I think.. BTW.. Im just right across the Clark bridge from you by Alton, IL...

Porting your heads if you have the time, energy, and equipment can be a good hp:$$ increase. I have read many places that just grinding down the EGR bumps is worth 20hp alone, kind of like a fart can and cold air kit with all nessasary stickers on a civic.

I run Thumper heads with stock valves and upgraded springs, not too slow IMO, but I could be faster. (no such thing as a car too fast.)

I have had a TMoss port lower intake sitting in my garage since I left for Iraq 9 1/2 month ago. I hope to put it on when I get back home.

SSStang said:

I have had a TMoss port lower intake sitting in my garage since I left for Iraq 9 1/2 month ago. I hope to put it on when I get back home.

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God speed my friend.............