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SLP ported/siamesed runners?
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
SLP ported/siamesed runners?
Supposedly the previous owner ported my intake and plenum, but its got the stock looking runners on it. I do NOT want to get a short ram or any other kind of ram intake right now because it would require too much additional work, like re-camming my cammed car.
I've heard reports of 20hp from the ported/Siamesed gargantuan runners. I figure that the SLP runners would work good with my current injectors and heads and cam etc.
So whats the deal w/ the SLP ported/siamesed runners... worth the $300 and 20hp (and better power curve)?
I've heard reports of 20hp from the ported/Siamesed gargantuan runners. I figure that the SLP runners would work good with my current injectors and heads and cam etc.
So whats the deal w/ the SLP ported/siamesed runners... worth the $300 and 20hp (and better power curve)?
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
http://forums.corvetteforum.com/c4-t...re-your-s.html
http://www.thirdgen.org/techboard/po...05-post14.html
http://www.thirdgen.org/techboard/po...05-post14.html
Last edited by vetteoz; Nov 20, 2013 at 02:59 PM.
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
Got 247rwhp with custom shorties, custom exhaust and tune. Haven't been on the dyno since I installed mega ported Edelcrock manifold, plenum, SLP runners and port matched 113 stock heads. Did all this for my my new 355 but dropped a spring after a couple of months so I'm re-doing it. It takes a lot of welding and many hours of porting to do it right. I think I have 80+ hours in the runners and manifold. When I finished, the SLP runners weighed half the weight they did when I started.
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
Broke through in a few places, welded them up and drove on. I found a couple of places on the runners where there were a lot of air pockets in the casting, but they were much better than the Edelcrocks I've seen. I've seen three pairs of Edelcrocks this year alone where the flange that mates to the plenum had to be ground true to seal properly.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
With your mods, I would think any aftermarket runner/base would yield pretty decent results. However, if you're going through the expense of replacing your runners and intake, it might be beneficial to consider alternative intakes like the superram, miniram, stealth rsm, etc.
On my 383 I have AS&M runners with an accel base. It makes gobs of torque and decent HP (325/450 to the wheels), but I'm fairly sure I'd gain at least 50 HP by switching to another intake.
On my 383 I have AS&M runners with an accel base. It makes gobs of torque and decent HP (325/450 to the wheels), but I'm fairly sure I'd gain at least 50 HP by switching to another intake.
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Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
The problem is I dont want a bigger hood, I dont want to spend $600-1000 for another intake, and then I dont want to re-cam the engine etc for the higher rpm powerband a different intake will achieve.
SLP runners are around $300 brand new and supposedly worth a good 20-30hp. It will shift my power curve up just enough that my supposed current mods (namely cam) will still be in their sweet spot.
SLP runners are around $300 brand new and supposedly worth a good 20-30hp. It will shift my power curve up just enough that my supposed current mods (namely cam) will still be in their sweet spot.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
If I were you pull the base off and take that sucker til its within its last breath of the casting til youre almost epoxying. wont hurt anything
Remember you have to go ALL the way through the runner necks way down about an in or so in and gets worse from there. It will take a long time but if you can DIY its free power. If you do it right the runners will look more squarish than round anymore
Cut the runners in half go to town on them weld back up. Might wanna jig it up first just in case or set the assy on the bench then - its about volume/dia not a huge entry way
Dont believe 30hp from just bolting those runners on .
Remember you have to go ALL the way through the runner necks way down about an in or so in and gets worse from there. It will take a long time but if you can DIY its free power. If you do it right the runners will look more squarish than round anymore
Cut the runners in half go to town on them weld back up. Might wanna jig it up first just in case or set the assy on the bench then - its about volume/dia not a huge entry way
Dont believe 30hp from just bolting those runners on .
Last edited by cv67; Nov 21, 2013 at 10:41 AM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
No doubt but remember they already probably outflow the stock base even with a little work done. So take the runners farther and butcher the hell out of the base that will be your restriction
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Well I suppose that could certainly be a good option to keep me entertained and busy this winter. What do you suggest using for the grinding of the runner?
How important is siamese? I've never done that before.
How important is siamese? I've never done that before.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
The problem is I dont want a bigger hood, I dont want to spend $600-1000 for another intake, and then I dont want to re-cam the engine etc for the higher rpm powerband a different intake will achieve.
SLP runners are around $300 brand new and supposedly worth a good 20-30hp. It will shift my power curve up just enough that my supposed current mods (namely cam) will still be in their sweet spot.
SLP runners are around $300 brand new and supposedly worth a good 20-30hp. It will shift my power curve up just enough that my supposed current mods (namely cam) will still be in their sweet spot.
Super Rams and Mini Rams have the same height profile as stock intakes. So there's no need to change the hood.
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Take a look at the cam in my sig. Thats what Brian @ TBIchips and me have concluded I'm most likely running based off of how the car runs, idles, the mods it has, what he was told to burn, and whats actually in the tune file.
The cam in my sig is good til about 5600rpms it seems. A super ram or mini ram will swap directly into my build with nothing else, and produce a strong running top end car?
The cam in my sig is good til about 5600rpms it seems. A super ram or mini ram will swap directly into my build with nothing else, and produce a strong running top end car?
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
Take a look at the cam in my sig. Thats what Brian @ TBIchips and me have concluded I'm most likely running based off of how the car runs, idles, the mods it has, what he was told to burn, and whats actually in the tune file.
The cam in my sig is good til about 5600rpms it seems. A super ram or mini ram will swap directly into my build with nothing else, and produce a strong running top end car?
The cam in my sig is good til about 5600rpms it seems. A super ram or mini ram will swap directly into my build with nothing else, and produce a strong running top end car?
The Super Ram is a common choice for the street. It has good low end torque, significantly better flow over stock and the shortened runners raise the power band. I have recorded 6000 RPM with my 396 Super Ram. Super Rams are no longer manufactured, so it can difficult to find one.
The Mini Ram performs at a little higher power band than the Super Ram and will flow better. But the Mini Ram does give up some low end torque. A big advantage of the Mini Ram is the ease of installation.
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Its a daily driver that I like to have fun with, take to the 1/8 once in a while, I want to start auto-x and road racing, etc.
I wont need new fuel rails or anything else if I somehow find a cheap mini ram?
I wont need new fuel rails or anything else if I somehow find a cheap mini ram?
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
The mini ram does require their fuel rails. The Super Ram uses stock rails.
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
^Thanks for the offer, '89.
I'm not trying to swap rails and all that right now. I guess I really just want to work out all the kinks and get this thing running properly first. Then body/interior. Then maybe i'll make rounds back to the motor
I'm not trying to swap rails and all that right now. I guess I really just want to work out all the kinks and get this thing running properly first. Then body/interior. Then maybe i'll make rounds back to the motor