I just bought a set because they are being discontinued.

summit part number is SUM-SLP20004.

Just thought you guys would like to know.

These runners are the same as the ones SLP sells on SLPonline.com for a lot more money.

 

THANK YOU! I just bought some for $157. The only difference between the 85-88 and 89+ is a litte hole that you can fill very easily. Nice price!

 

I paid more than that used.

 

Get your minds out of the gutter!!!

 

THANKS SO MUCH MAN! ive never seen any runners that cheap and even though i really cant afford even that much right now i went ahead and ordered them b/c that is too good of a deal to pass up. and for reference the part # was sum-slp20002 for the $150 ones for 85-88. and the sum-slp20004 was $180 for 89-92. THANKS MAN

 

Does anyone know the actual gaines but installing these and porting the plenum to match? I heard from some folks that you may lose a ****load of bottom end power....

 

You guys really shouldn't post stuff like this. Now I have to go home and explain to my wife why I just ordered a set of these. So who can I stay with for a few days? Seriously though, thanks for the tip.

Later, Brandon

 

yea hell yea! I just ordered a set of the 88-92's, I am so broke right now but I just had to get in on this deal ROFL


I just hope they had some left.

 

just got me a set of 85-88 for 157.45 including tax and shipping.

Too good to pass up. I've seen these for 400 new and a set just sold on ebay for 275 used. Damn good deal.

THANKS hungry4des

you are the man.

hodge

 

You bastard!

Just went and got a set.

Too good to pass up but now it opens up a whole can of worms. Gotta port the plenum, gotta get a base.....

It will never stop!!!

 

Is Summit just discontinuing to carry the runners or is SLP stopping production?

 

Summit racing equipment

That's weird.

Maybe summit ordered a special run from SLP or SLP doesn't make em any more so since summit are the only people that have em they can call them that. Who knows.

I wanted to ask if you just plug the hole with gasket maker or with a threaded plug or what. I guess I will find out when they get here.
:lala:

 

Hodge: If they are new from SLP for $259 (non polished) .. who in their right mind are paying $400 on ebay?

 

The $40 difference is just a hole for the cold start valve - fill it with jb weld, silicone, block it off with sheet metal, whatever. It's the size of a quarter. Hell, stick a quarter over it or a nickel and something else in it.

 

I didn't say I saw them go for 400 on Ebay. That was a catalog price I saw for them.

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1856628357

Here's a set that sold on ebay though for much more than we all just paid for new ones and it doesn't even say that they come with bolts and gaskets

 

I just had to repost and thank hungry4des for hooking it up.


What a great deal

So now on to the cons, what will these do on a 305? I heard I will lose bottom end and Gain some mid range tork.

 

I talked to a guy at holley. He recommends a cam, porting the plenum and a high flow or nicely ported base to get between 12 and 18 hp on a 305.
This is why i'm skeptical. By the way, the older style 85-88 runners are sold out.
On a stock motor, he said the loss down low will be evident but you'll gain some rpm's up top. I don't know about you guys, but I don't like reving the motor past 4500-4800 anyways...it just isn't designed to do so.

 

I rev up to 5K with the stock setup when I race, I would love to rev a little higher.

 

i just got a set of the 89-92 ones... there were only 2 left when i ordered...... geuss there is only one now

 

i ordered earlier, i think they will do nice on my car i have a mild cam, headers, cat back, ported plenum, and im gonna install a afpr and port the intake some while im at it, im gonna get one of those asp underdrive pulleys. Then maybe ill be feeling something in the butt dyno. no but seriously i couldnt beleive it... i ran to my room grabbed my wallet and hit www.summitracing.com as fast as i could. I garuentee that they sold a butt load of those things today. I was so worried i called to make sure they shipped my order, and before i told the guy he knew my name..... kinda creepy but afterwards i was dancing around like this....:lala:

$150 slp runners:hail:

 

there were no $150 left tho

 

This is a funny thread. Summit will now be scratching their heads wondering why they just sold 14 setss of a product in basically 24 hours, when they probably couldn't even sell one set a week on average before hand.

Hmmm.... maybe now they'll bug slp to make one more run!

 

thats why they went so quick!

the 85-87's actually went on sale over the weekend (bought a set) but on wensday the 88-> went on sale so i bought a set for my 89. selling the 85-87 at bout 220 right now, so i will make up the difference. oh i received the 85->'s on wed and the 88->'s yesterday. i've already ported the plenum and runners and installed them last night. i wrecked my plenum gaskets, the 1st set, had them trimmed down and everything so i had to reuse the originals. i will trim them down this weekend to fit properly with my hogged out runners and plenum. the runners are siamesed partically but the casting is really rough on some, the 85's where worse then the 88's i received and the split was really small so i ground it all out and made it pretty. i actually matched the plenum and runner openings just need to remodel my gaskets again and hopefully not destroy this set.

didnt feel any lose at all in my 350 iroc and the top end does pull pretty hard, my car is nearly stock. i have a spare base manifold i still need to work with or sell.

 

Those of you with ETs with stock runners Im interested to see how your car responds with only the runners swapped. My experiences werent good and those of you without baseline runs now would be a good time to get them and see what the runners net you, mine are currently sitting in my closet where they perform best...

 

i'd agree out of the box they where not pretty inside as you would like. the stock runners where allot smoother in comparison. they are a good starting point to go in with the grinder though.

 

It would be absolutely stupid to put these on a car and not do anything else. When I took them out of the box I realized that I HAD to do some more work to the plenum and I already have an aftermarket base.

Thirdgenz28 92, how did you run such a low 60'?

 

SLP 2k stall, sticky BFG drag radials set to 18 psi, Spohn LCAs, SFCs and 6 years worth of driving the same car and over a hundred something passes down the strip to get to know what the car likes and dislikes. Even with my Eibachs Ive still managed a 1.80 and Ive yet to add the Spohn LCA relocation brackets I have sititng here. So to answer your question, an L98 w/ bolt ons, sticky tires and a few suspension pieces but mostly practice and a little luck with good track prep...

 

I totally agree but i didnt just do the plenum, it was already ported to a point, i just cut out the divider i had already enlarged the hole size. i spent most of my time on the runners themselves, i found them to be sub-par out of the box. i only spent 6hrs total so there is allot more work yet to be done of course.

the runners are good but not a simple slap on, you need to massage them a bit. i was a bit unhappy with the fitment of the casting compared to the gaskets. mine where off by a condersable amount, way over on 1 side and projecting into the runner on the oposite side. i am ordering big mouth gaskets to work with as a template. i want to get rid of edges in the air stream which as cast seem to be there or place part of the gasket in the way. i didnt inspect the manifold side yet just the plenum, i will worry more about the manifold side when i swap it for the 1 in my closest after some work.

 

is there anymore?ah man i want some... yea i know its stock... but i will use them one day after everything is done in winter... ahhhhh man

 

According to Summit. I just ordered the last set of SLP 89+ runners. Sorry to disappoint anyone. I haven't even seen this thread until I ordered. I just lucked out.

 

dam... there all gone.. but thoes are for 89 and up... im gunna call back and ask them if they have any for 88 and below

 

I just got mine, there cool

Now to port and get these suckas on the IROC-Z, man I hope they'll do more good than bad lol.

Say, are these runners a little shorter than stock? I mean do they travel less? or are they just bigger?

EDIT:

Further inspection shows that gasket match is a must as well as smoothing out the inners castings.

 

Where they are siamesed, that is shortening the runner, and enlarging the plenum area.... in theory. There was a guide to TPI or something, I lost it though

Wish I'd have known about this, they're alllll gone now.

 

Keep checking.. maybe they are finding more boxes somewhere. They ran out days ago but apparently nc-iroc got some afterwards.

 

I don't have tools, garage, or another car to port right now.

Do you guys think that I will do more harm than good to slap them on right out of the box. I have headers, 50psi fuel, 3" exhaust, functional ram air, 5.7L tpi, new gutted MAF, ignition box, superconductor wires, airfoil, coil, etc....

The runners must do some good out of the box right!!!!!?

Give me a reason to put them on now please????!!!!!!

 

The fact you had a 350 is good enough, BUT it is completly pointless if you install them without siamesing the plenum.


SLP Siamese runners are the exact same size as the stock runners, just capable of being siamesed and way meatier for porting.

 

I totally agree.

I will difinitely go back and port everything when I have the chance. I will probably look in to getting an edelbrock base and throttle body at the same time so I can port them too.

Until then, I guess they're going on as is.

I can't freekin wait for them to get here!!!!!

:rockon:

 

when you get them put the plenum gaskets on and see how far off the castings are. mine where off quite a bit so i had to trim the gaskets and do some work on the runners too.

 

My gaskets line up on each side perfectly, but the runners themselve overlap a little, so I will need to port them a bit.

 

mine where a little worse then, in some areas the runners protruded and in others the gaskets protruded. kind of like things had gotten shifted a little bit. little gasket trimming and runner trimming took care of that though.

oh i forgot 1 gasket was much worse then the other, but when i swapped sides they matched up allot better. maybe i should specify, the gaskets are runner specific meaning 1 is for the right and 1 is for the left. the stock gaskets are not marked but i use felpro's that are, just a personal prefrence thing.

 

hey, if no one wants them, i will be happy to take them off someones hands!!.... ahh ***, i should of called earlier!! dam im mad now... SOB ahahahah!

 

They finally got here! :lala:

You guys were right, they are a little rough bet pretty meaty. They match the gaskets pretty well except for one runner on each side of the plenum but it's nothing we can fix.


I'll slap them on and I'll tell you guys what I feel in about a week.

by the way, I screwed up my MAF (the little fin inside the little tube snapped like a twig) so I bought a new one and cut the fins out and damn it really made a good difference in the higher RPMs. I don't know if it was just changing the 5 year old MAF or cutting out the fins that made the difference. I guess both.

 

I'm looking for a clean,straight set of stock runners if someone wants to sell theirs after installing the new SLP's. I have the rougher surfaced style and I wanted to have some I could polish. Thanks

 

what yr are you looking for? i have a clean set of 88-> stock runners i have put on ebay yet.l

 

Yesterday, I gasket matched the runners and Siamesed the plenum, took me about 5 hrs. to do the hole thing, but hell, I want to take advantage of these suckas & gett he best flow I can, I did however use the stock siamese size since I dont have any extreme mods at the moment.

After putting them on & going out for a test run, I did feel it harder at higher rpms, I was shifting at 5,500 rpms and it honestly felt like it could pull a bit more, but I was afraid of my redline LOL.

I think they were definatly a great investment.

 

coolnss ill be doing the same

 

I thought mine made the car feel faster too, strip results proved me wrong as my times fell off by .2-.3 and cost me a few MPH. Im going to gasket match mine and try them again and see what I get, if I get poor results again they will be in the classified section shortly after. Im just waiting patiently for others results(from the track no Gtechs) before and after the runner swap...

 

What modifications do you have in your car?

 

so 92, you ar telling me you didnt do anything to those runners, you just bloted them on? those gaskets line up like ****, nowounder your car ran slower.

 

You know what, I didn't even see that part.

That would probably be why u ran crappy, you didn't even port the runners to match the plenum, did you even siamese/ fully port the plenum, do you have an AFPR to help feed the new flow setup?


You won't gain crap from then unless the plenum is fully ported and siamesed, non the less gasket matched