With all the talk of siamesing the ports on intakes and runners - have any of you siamesed the short runners on your SuperRam? How about the intake? I've got the Edelbrock big-mouth and the bore on each port is HUGE! Would opening those up help any or would it be overkill for a 355? Has anyone done extensive porting to their SR system?

BTW, there is a whole SR system for sale over at 3rdGen.org. The owner is selling it with some kind of DFI.

SR for sale

 

IM dont think I would siamese the SuperRam runners. There was a guy recently on the Corvette forum that did this. He slowed down a few tenths, cant remember his name. Do a search and you should find it.

I recently ported my SuperRam runners and base. I opened the runners up to 1 3/4. I also ported the base opening to 1 3/4 and opened the runners up, didnt change the shape just increased the cross sedtion width.

I also Installed SLP 1 3/4 headers and a higher flow exhaust, fixed a clogged cat. The car revs so much better over 5000. IM getting ready to swap in a new tranny, and then I will go back to the dyno to tune it.

 

Do you happen to know what the rest of the set-up was? Does anyone have an explanation as to why that would slow the car down? I was thinking about doing it to my set-up cuz I figured the 406 could use all the air it could get.

 

No I dont remember much about the whole setup. Do a search on corvetteforum.com/ I know there was a big thread about it at one time. I was thinking about doing it on mine for the same reasons but changed my mind after reading what his results were.

 

Look for a guy named 'ralph' on there. His setup on his 85 vette is the stock 350 shortblock, Superram, LPE 219 cam, and AFR 190s. He runs in the 11's @ 116 I believe with 3.45 gears.

I don't remember why he slowed down. MY guess is that his whole setup is maximized to work in that airflow and rpm range that the head, cam, and intake were designed for. Maybe with a different cam and higher flowing heads he might have gained with a siamesed SR. Put the same setup on a 383 or 406 and the siamesed SR will most likely be more beneficial than on a 350. Or you can just go with a miniram.