My siamese porting job(part 2)

rich88gta · 09-04-2002

That other thread has gotten quite large. Time to make a new one.

Anyway, I have a question for you guys. What do you think about leaving the SLP runners alone? I have been beating myself over the head with this problem for the last day or so. This is what I think: If I leave them alone I assume it will smooth the flow going into the intake, as well as keep the air velocity up. Now if I port them out the engine will have just that much more free air to grab when it needs it. Though the gains could be good on a stock 350 I am sceptical on if it will pull in enough air to keep the velocity at a decent enough level...Its a gamble I know. Do you think it will be worth the risk?

gtayumiko · 09-05-2002

I do not know if you will get a good answer to your questioning, simply because I think on this project you have gone where no man (GTA owner) has gone before, at least from my own experiences talking with guys about GTA's and engine stuff. I think most of us, at least myself, we are just watching you cause I do not know a thing about this. keep posting this one though, and photos too. Good luck. Yumiko

rich88gta · 09-05-2002

Well, thats ok. I think I have made up my mind anyway. I think I will just go ahead and leave them in there stock form for now. Heck, I can always pull them off later if I feel the engine needs more.

IROC-T · 09-05-2002

Your pin holes are caused from three things working in unisen. Two dissimalar metals(iron,alum.),and water/antifreeze(stagnet) which causes electrolysis,w3hich will eat the aluminum. A GOOD fix is a product you can pick-up from a marine dealer its cal Marine-Tex this stuff is great for this kind of thing, I used it to put a header stud in my tucks head eight (8) years ago and I have put a lot of torque & on it over the years and its still holding strong, you can even fix a cracked head with it. Good Luck T.

IROC-T · 09-05-2002

I think I would try and Port match the runners if possibile this would give you a smoother flow of air.... T.

Fred91GTA · 09-05-2002

Well, I read a post about someone on thirdgen.org who did the same thing you're doing rich. He ported the hell out of his SLPs and base TPI intake manifold. You could try asking over there but like usual, a bunch of flamers and know-it-alls. That's why I never go there anymore. I dio agree with leaving the SLPs alone for now. You can always port them out later on if you decide to. Kinda like a before and after comparison huh?

rich88gta · 09-05-2002

Ya, It just seems like a good idea to do it that way. But, I will be following IROC-T's suggestion and port match them. It would be a stupid thing to port the intake and then bolt on somthing not matched to the gaskets that I am using. Having a step in the middle of my airway is not somthing to be desired

BTW...does anyone else hate the way SLP does there shipping? I ordered the runners yesterday and they wont even mail them out for 3-4 days???? Whats up with that? $20 to ship a set of runners that weigh, what? 5lbs? via UPS ground? I will be lucky to see those runners by thursday(sigh).

Dj92GTA · 09-05-2002

SLP doesnt even ship to canada... id like to know how they get the parts to do the conversions considering they modify the freaking cars up here

Im with IROC-T though... gasket match them so there isnt a ridge that the air smacks into and basically nullifiles all your porting.

Brent87LT1 · 09-05-2002

That's $20 for shipping and handling. A lot of companies incur their S&R overhead in the handling charges rather than in product price.
Also, many mail order companies will not ship until the credit card has been processed. I hate it too.

rich88gta · 09-05-2002

Ok, shipping and handling......it still sucks.

rich88gta · 09-06-2002

Well, considering that I am stuck here waiting to get my runners. I decided to polish my fuel rails. Tell me what you think. Its a cloudy day here in San Diego so keep that in mind.

ghettocruiser · 09-06-2002

Nice... I polished mine when i did my intake gasket change, and thats about how they look. I was in a hurry and it was 4am..so yours look better. Thats gonna top off your motor nicely.

rich88gta · 09-06-2002

Ya I think they will look pretty good once all assembled. It was alot easier than doing cast aluminum thats for sure. It took probably about an hour or so to do. I used 320 grit dry/320 wet/ 400 dry/ 400 wet/ then polished with #0000 steel wool and mothers. Buffed out with a flannel cloth.

Dj92GTA · 09-06-2002

wow... you should get them andonzied the color of your car now.. that would be sweet

rich88gta · 09-07-2002

OK...at a bit of a delema here. I just finished porting my plenum. I am now in the process of polishing it. I cant seem to get into the grooves at the top well enough to satisfy me. My question is simple though....do I just leave all that casting there and polish around it....do I paint the plenum the color of the body(or what it will be anyway) or do I fight with it for the next couple of days and see if I cant get in the grooves?

Oh btw if painting is a suggestion what type of paint would be good?

ghettocruiser · 09-08-2002

i would suggest gettin some dremel polishing bits...to get into the grooves... i was just at home depot and i saw some that looked to be helpful. might take some time and patience...small coverage with the small bits. as for paint, if you go that route, I would stop by your local autozone or pep boys... they should have engine enamel paint in a wide variety of colors. its good to 500 degrees. that is what i used on my pontiac 400 that i built. and since im a sceptical person, i wanted to see how much heat it could take, so i took a blow torch to a part that i painted, it took quite awhile before it even turned brown. also, ive found with that paint, that it dries realy fast, and hard so it wont be tacky. it sprays really nice too...good coverage. i actually used gloss black engine paint on my inner fender wells and the finish is really nice. they even make a clear coat in that high temp paint. just a suggestion....im hooked on the engine enamel....

Justin

rich88gta · 09-08-2002

Thanks man, I think ill go the painting route. I think it will look better anyway...more custom you know? I have a dremel with the small bits too(thats how I ported my base

) and havent had much luck in the grooves....I keep grinding the sides and messing those up....

rich88gta · 09-10-2002

After many hours of sanding(still not done yet) I think I am at that point that I should start painting the grooves. The color I am going with is called Ford Red. Its about the closest thing I could come to GM Bright Red. What do you think?

rich88gta · 09-10-2002

oops here is the pic

Dj92GTA · 09-10-2002

nice shine rich... i think i will be trying the same thing soon... looks as if ive decided to ditch the way of the LT1 and do it LTR style..

09-04-2002	#1
rich88gta GTA Junkie Join Date: Mar 2002 Location: Marquette MI Posts: 423	My siamese porting job(part 2) That other thread has gotten quite large. Time to make a new one. Anyway, I have a question for you guys. What do you think about leaving the SLP runners alone? I have been beating myself over the head with this problem for the last day or so. This is what I think: If I leave them alone I assume it will smooth the flow going into the intake, as well as keep the air velocity up. Now if I port them out the engine will have just that much more free air to grab when it needs it. Though the gains could be good on a stock 350 I am sceptical on if it will pull in enough air to keep the velocity at a decent enough level...Its a gamble I know. Do you think it will be worth the risk?

09-05-2002	#2
gtayumiko GTA Member Join Date: Oct 2001 Posts: 1,498	I do not know if you will get a good answer to your questioning, simply because I think on this project you have gone where no man (GTA owner) has gone before, at least from my own experiences talking with guys about GTA's and engine stuff. I think most of us, at least myself, we are just watching you cause I do not know a thing about this. keep posting this one though, and photos too. Good luck. Yumiko __________________ Love like you've never been hurt before.

09-05-2002	#4
IROC-T Who was that masked man? Join Date: Jan 2001 Location: Rialto CA. So.Left Coast Posts: 21	Maggots Your pin holes are caused from three things working in unisen. Two dissimalar metals(iron,alum.),and water/antifreeze(stagnet) which causes electrolysis,w3hich will eat the aluminum. A GOOD fix is a product you can pick-up from a marine dealer its cal Marine-Tex this stuff is great for this kind of thing, I used it to put a header stud in my tucks head eight (8) years ago and I have put a lot of torque & on it over the years and its still holding strong, you can even fix a cracked head with it. Good Luck T.

09-05-2002	#5
IROC-T Who was that masked man? Join Date: Jan 2001 Location: Rialto CA. So.Left Coast Posts: 21	P.S. Match.. I think I would try and Port match the runners if possibile this would give you a smoother flow of air.... T.

09-05-2002	#6
Fred91GTA "Firehawk" GTA owner Join Date: Oct 2001 Location: Brooklyn, NYC Posts: 1,656	Well, I read a post about someone on thirdgen.org who did the same thing you're doing rich. He ported the hell out of his SLPs and base TPI intake manifold. You could try asking over there but like usual, a bunch of flamers and know-it-alls. That's why I never go there anymore. I dio agree with leaving the SLPs alone for now. You can always port them out later on if you decide to. Kinda like a before and after comparison huh? __________________ Fred 1991 Trans Am GTA... Hopefully again

09-05-2002	#8
Dj92GTA GTA Member Join Date: Jul 2002 Location: Canada Posts: 158	SLP doesnt even ship to canada... id like to know how they get the parts to do the conversions considering they modify the freaking cars up here Im with IROC-T though... gasket match them so there isnt a ridge that the air smacks into and basically nullifiles all your porting. __________________ 92 GTA Quasar Blue

09-05-2002	#9
Brent87LT1 Multi-Vehicle Member Join Date: Oct 2001 Location: Near Tulsa, OK Posts: 267	That's $20 for shipping and handling. A lot of companies incur their S&R overhead in the handling charges rather than in product price. Also, many mail order companies will not ship until the credit card has been processed. I hate it too. __________________ Has-been GTA Owner.Brent

09-06-2002	#11
rich88gta GTA Junkie Join Date: Mar 2002 Location: Marquette MI Posts: 423	Well, considering that I am stuck here waiting to get my runners. I decided to polish my fuel rails. Tell me what you think. Its a cloudy day here in San Diego so keep that in mind.

09-06-2002	#12
ghettocruiser Multi-Vehicle Member Join Date: Apr 2002 Location: Coatesville Posts: 189	Nice... I polished mine when i did my intake gasket change, and thats about how they look. I was in a hurry and it was 4am..so yours look better. Thats gonna top off your motor nicely.

09-07-2002	#15
rich88gta GTA Junkie Join Date: Mar 2002 Location: Marquette MI Posts: 423	OK...at a bit of a delema here. I just finished porting my plenum. I am now in the process of polishing it. I cant seem to get into the grooves at the top well enough to satisfy me. My question is simple though....do I just leave all that casting there and polish around it....do I paint the plenum the color of the body(or what it will be anyway) or do I fight with it for the next couple of days and see if I cant get in the grooves? Oh btw if painting is a suggestion what type of paint would be good?

09-08-2002	#16
ghettocruiser Multi-Vehicle Member Join Date: Apr 2002 Location: Coatesville Posts: 189	i would suggest gettin some dremel polishing bits...to get into the grooves... i was just at home depot and i saw some that looked to be helpful. might take some time and patience...small coverage with the small bits. as for paint, if you go that route, I would stop by your local autozone or pep boys... they should have engine enamel paint in a wide variety of colors. its good to 500 degrees. that is what i used on my pontiac 400 that i built. and since im a sceptical person, i wanted to see how much heat it could take, so i took a blow torch to a part that i painted, it took quite awhile before it even turned brown. also, ive found with that paint, that it dries realy fast, and hard so it wont be tacky. it sprays really nice too...good coverage. i actually used gloss black engine paint on my inner fender wells and the finish is really nice. they even make a clear coat in that high temp paint. just a suggestion....im hooked on the engine enamel.... Justin

09-10-2002	#18
rich88gta GTA Junkie Join Date: Mar 2002 Location: Marquette MI Posts: 423	After many hours of sanding(still not done yet) I think I am at that point that I should start painting the grooves. The color I am going with is called Ford Red. Its about the closest thing I could come to GM Bright Red. What do you think?

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