KillerZ302

iTrader: (4)

I cant decide what intake to Upgrade to. Stealth Ram or SLP Runners, Ported plenum and high flow base? I dont want the mini ram pizza box thing.
Tunning is no problem, I am using a Haltech Stand alone.
its a forged 383 with 16LBS of boost and a 150 Shot

Whats your opinions guys? Thanks

83 Crossfire TA

iTrader: (2)

Depends on your goals…. Unless you plan on going _really_ fast with it, one isn’t really going to be faster than the other if you choose the right combination of parts, I would basically go:
- TPI – looks, people are more impressed if you go fast with them, cost…
- SR – ease of maintenence

KillerZ302

iTrader: (4)

Thanks. I am just going to go with the slp runners and port the hell out of the plenum for the runners and TB.

sofakingdom

iTrader: (1)

The MiniRam isn't the "pizza box". That's the SuperRam, the ulimate PITA design.

Here's what the MiniRam looks like. If you're familiar with the LT1, you might notice that the LT1 intake which was introduced a few years later, closely resembles it in many ways.



The more you depend on boost, the less difference the intake system makes to the overall package. You can force ALOT of air through not much runner, with enough squeeze.

That said, the Stealth Ram will out-flow any of the TPI-based systems that use the stock base and long runners. I also think you'll find that it will cost less than the SLP stuff. The MiniRam will outflow them all, but costs quite a bit more; and I doubt the difference in flow would gain you very much, with the boost. When the intake tract is under 2 bar of pressure, minor details in the sizes of things, that might make a HUGE difference at atmospheric, become far less of an issue.

The flow restriction in TPI isn't the plenum; it's the BASE. You'd basically be wasting perfectly good abrasive by messing with the plenum. The payoff, to what little extent there even is a payoff, is in the BASE.

KillerZ302

iTrader: (4)

Thanks man. i never took that into consideration. Boost will flow thru anything just the velocity and pressure would change with the different intakes. I will look into a stealth ram because of the price.
thanks

junkcltr

iTrader: (1)

The Holley SR is the best bang for the buck. The LT1/miniram has the shortest runners and highest RPM potential. The SR falls between that and the TPI unit. All will make plenty of power. It just depends on what RPM range you want it at. With the proper cam the SR is a good unit.

WheelsUp84z

iTrader: (2)

single plane converted with an elbow. Quit messin around.

JAYDUBB

Yeah. I sold my HSR. I took it to my machinist. He laughed at it and stated "You wont make any power with this". He also said it would cost too much to modify it to fit AFR 210 heads. So... Im buying a Victor EFI intake unless I decide to go blow-thru.

KillerZ302

iTrader: (4)

I would love to do the victor efi but the throttle bodies are soo dam much. For the 4-barrel tb its almost $500.00 just for the tb. I think thats too much.

It would make big power over the conventiona efi intakes.

sofakingdom

iTrader: (1)

Yeah, N/A the HSR has a limit; maybe 425-450 HP, based on the runner sizes, assuming street compression ratios and pump gas. But at 2 bar (15 psi) and a suitable CR for that, that 450 HP becomes something nearer 650 - 700 HP. ALOT less of an issue. Certainly not worth the difference in cost between the HSR (which lets you re-use a few $$$$ things like your TB) and just about anything else, on a motor as little as a 383. N/A of course would be a WHOLE different matter.

gta324

Hmm... I will put AFR210CC on this winter together with my HSR... Whats the problem?

sradams21

iTrader: (1)

Go with the Stealth Ram. It's not as rpm/flow restricting at the SLP runners. The Stealth Ram is generally good up to 6,500-6,800rpm compared to the modifed stock TPI set-up that's good to maybe 5,600rpm.

JAYDUBB

My machinist said that he would have to add material to the top of the manifold to fit a 1206 felpro intake gasket (of course we all know that). When he quoted labor to do all of that, I about puked. So I sold it on Ebay...

I REALLY wanted to use the HSR though. I dont want to spend $$$ modifying something when I can spend less on an intake that will work UNMODIFIED.

And before you all bash my machinist (I know how you org'ers are...), I have spoken to a few well known shops that have used the HSR. One of them said that he had to modify it entirely too much and that he wouldnt use it again, nor would he recommend it to anyone trying to make big HP.

JAYDUBB

I agree. Now that I have taken a second look, I realize that this intake will probably work GREAT for KillerZ302. It just wont work well for me.

What heads does KillerZ302 have? I was going to run the AFR195's but changed my mind and decided to run AFR210's after having a LOOOONG talk with my machinist. Basically he supports the "spend the money right the first time" theory, if there is such a theory. Considering how much Im spending, I agree with him. A lot of $$$ and a lot of time...

WheelsUp84z

iTrader: (2)

well IIRC some of the HSR's have 1206 ports. Also you dont have to run the carbed style TB if you go with the single plane, a 90* elbow from intakeelbows.com can work with your l98/lt1 style throttle body. Or you can just get a LS1/LS2 pulloff and make it work, not that hard.

1bad91Z

iTrader: (1)

Doesn't some company make an elbow that will bolt to a single plane and allow a twin blade TPI throttle body to be bolted to it?

JAYDUBB

According to Holley, they dont. I had a recently casted HSR (2/2007 IIRC). My machinist measured it and it neeeded a little grinding just to fit a 1205. I called Holley and they dont even recommend trying to make it fit a 1206. My machinist recommended against it also.
----------
I think Accel makes it...

I am thinking about using a Wilson elbow and a 90mm TB. I might go 4-bbl style TB with an EV bonnet.

Decisions...

1bad91Z

iTrader: (1)

It just seems like using the TPI TB may be more cost effective and a little more plug and play (TPS / IAC )...

WheelsUp84z

iTrader: (2)

like i said originally, intakeelbows.com its not listed on their site anymore but call/email arron and you'll get one if you go over to ls1tech.com you see one that was put on an lt1 car. should be on nitrousoutlet.com's gallery as well.

JAYDUBB

It would be a plug 'n play itme for me if my car was a TPI car. My car is a TBI car. I will be using a TEC3r (hopefully...).

gta324

Hmmm... OK, so what manifold is recommended for big HP with 1206 port then?

/N.

WheelsUp84z

iTrader: (2)

holley commander is another good option. Easy tunability, and work with TPI setupts for easy plug and play. Just under $900 with the wiring harness. Marty's firebird has be low 9's with a stock 350/tpi and twin turbos. Checkout the gm section on www.theturboforums.com under thread "how long till it grenades?" AWESOME info for those wanting to boost.

junkcltr

iTrader: (1)

The SR was redesigned to have more material at the top of the runner to head interface. The info. you are getting here is for older SR intakes. Check out the intake forum for more info. Pretty much all the SR info posted here is very misleading and sometimes false.


If a victor intake is used for EFI, why not just make the carb flange adapter elbow with the TB of choice flange on the other end. Anyone actually measure the port length of the Victor Jr. and Stealth Ram intake? You may be surprised what you find.

BTW, posting a pic of an engine does not make it easier to decide which intake is better for it. That is why you end up getting "my machinist said...", "my neighbor's Mom said Victor Jr....".
Posting the cam specs and head specs would be more appropriate.

gta324

I will put on AFR 210cc heads this winter and while I have it apart I thought It could be nice with a new intake.... I have already welded x-tra mtrl on my hsr.....and ported it to 1206......

Cam 227/239 ,560/,577 114lobe
415cui
around 8,7:1
15 psi boost.............

Will investigate Victor jr more...........

/N.

JAYDUBB

Im familiar with that thread. Very familiar. I even offered Marty my Stealth Ram before I sold it on Ebay.

Maybe I could use the HSR but after talking to my machinist, I have decided to go with the single-plane instead. The Holley C950 is nice also. I just decided to go with the Electromotive ECU.

junkcltr

iTrader: (1)

My post wasn't aimed toward you. The SR will work fine with your setup. It is obvious you planned it out well. With an exhaust lobe that big I would work on a good exhaust system and decent sized turbine. Of course, spool time is a sacrifice, but it will be worth it on the top end.

junkcltr

iTrader: (1)

With an early SR I would have done the same thing without a TIG at hand. Are you making an adapter for an EFI one or two barrel TB or going with a 4 barrel carb type unit?

Orr89RocZ

iTrader: (20)

newer SR's have extra material on them for porting out to 1206 port... only manifolds cast in 07 i believe so brand new ones have it.

JAYDUBB

I havent decided which way I wanna go yet. Elbow + 90mm or 4-bbl + Ev bonnet... Dont know yet.

junkcltr

iTrader: (1)

A one barrel TB is a lot cheaper than the 4 barrel. If you use the one barrel then you don't need the hat. Take that into consideration when you choose the TB. Even with the cost of the elbow I would think it comes out cheaper going with the EFI one barrel setup.

JAYDUBB

I will look into that. Im still ordering the short block stuff...

83 Crossfire TA

iTrader: (2)

I know that it’s pretty much a dead subject, but I’ve had a late and an early HSR in my hands and the late one definitely has enough meat on the tops of the ports to open it up for a 1206, but some of the very early ones didn’t even have enough metal there for the machining to be done right and for it to seal on stock ports.

OTOH, the thing is hideously ugly looking a bit like a gift wrapped elephant and there are dozens of ways that they could have designed it better.

Heh, I ran across a deal on a killer, heavily worked VictorJr, so I grabbed it and added injector bungs (actually, I added angled pads to the tops of the runner pairs and then drilled them for injectors, much neater that way and I could be pickier about injector location and not worry about warping the flange surface). In the mean time I’ve “accumulated” an accel 1000cfm 4bbl, a BBK 58mm (LT1 style, but looking at it I don’t see any reason why it won’t work with the original TPI stuff), and a vortec style single barrel (as well as the plugs/sensors to adapt that to my TPI harness). I can’t decide which I’m going to run.

I think right now my front runner is the stock style 58mm on an elbow (I’ll make it). It should be the shortest and most likely to fit under the hood plus the elbow gives me a place to experiment with mounting additional injectors.

The funny thing is that it’s not like I really think I’ll need all this, it’s just that although I think that the TPI manifold looks cool, I hate working on an engine with one just because of the extra gaskets and all the extra bolts you have to deal with when touching anything on the top end… so I’m just messing with all this to get rid of that hassle.