Holley Stealth Ram Tip for more HP

[stroker87]

I was talking to Grumpy as some of you know about tweaking things to pickup some HP since my engine had to come apart, Grumpy told me that on his HSR he narrowed the intake runners thickness as you see in the picture so while I was waiting on parts to come on I done as he stated

Grumpy picked up 20HP just from this, its another freebe :mrgreen: just takes some of you time

HOLLEY changed the STEALTHRAM casting to a thicker flange a few years ago , notice the lower intake is marginally thicker allowing larger ports to be cut when porting

this is what you currently have :shock:

This is what you want to have (you can almost see the HP) :twisted:

stealthram base

stealthram base

you may be amazed to find a great deal of research and testing has been done and theres actually proven facts rather than random guess work to use in planing a well built engine combo

stock un-ported runner entrances

porting helps flow significantly
JUST A NOTE, in my experience,if your into building a TPI the secret is in matched components and use of great heads, find heads that flow a MINIMUM of 250cfm at .500 lift, use a 10:1-10.5:1 cpr 36-42 lb injectors
A PROPERLY PORTED AND MODIFIED STEALTH RAM INTAKE,

http://www.rodandcustommagazine.com/tec ... index.html

stock un-ported runner entrances

Correctly done porting helps air flow significantly, just keep in mind its part of a complete system, so the injector size, fuel pressure, and air cleaner restriction to air flow, the cams lift, duration,LSA, intended power band, cylinder head flow rates and exhaust restriction, & scavenging , all play a major roll in your results

 

[grumpyvette]

you reduce turbulence at the runner entrance and significantly improve flow rates in each runner when this is done correctly, ID highly advise doing this mod on a stealth ram base if your running one, its not all that difficult and you ll see the difference, the mod results in at the track, in most cases, naturally you won,t see the full potential unless your running a cam, heads and exhaust that also maximize the cylinder flow rates, but its easy enough to do that it should be done even if your not quite up to those levels
have you ported the stealth ram intake yet?

these significant flow rate improvements are possible, now I did a great deal more than what the links show On my stealth ram but theres a great deal of potential if you can weld and port, even on my 383 just mild porting resulted in significant seat of the pants gains and over 1/10 second in the 1/4 mile over the stock intake, Im sure I got even more gains later with the far more extensive porting to both the intake and heads but I also changed cams and rocker ratios at the same time, so I don,t know how much was the result of just the extensive extra intake mods , port runner welding and porting work.
keep in mind the headers must be tuned to match the cams power range to effectively scavenge the cylinders efficiently and any restriction to the exhaust or intake air flow with a restrictive muffler or air filter will cost you power so Id advise a low restriction 3" exhaust with an (X) pipe and measuring the intake and exhaust restriction and back pressure with a vacuum gauge, don,t assume VERIFY, that, and youll need the correct fuel pressure and injector size, in a serious combo your going to need to maintain a 12.5:1-12.8:1 f/a ratio, less than 1 psi of exhaust back pressure and a fuel rate of .55 bsfc, normally a 36lb-42 lb injector on a serious SBC (USE THE CHARTS AND CALCULATORS)

viewtopic.php?f=55&t=5503&p=18605&hilit=injector+size#p18605

viewtopic.php?f=55&t=1555&p=3616&hilit=1985+1986#p3616

HSR =HOLLEY STEALTH RAM

calculate required octane for compression ratio

What else influences your car's octane requirements? IF YOU DON,T LIKE READING SUB-LINKS, AND LOOKING AT CHARTS , AND DOING A BIT OF MATH 'AND INDIVIDUAL CALCULATIONS, YOUR UN-LIKELY TO BENEFIT FROM MOST OF THE THREADS, ON THIS WEB SITE! LIKE IN MOST AREAS ITS KNOWLEDGE AND THE ABILITY TO THINK...

garage.grumpysperformance.com

http://www.summitracing.com/parts/NOS-05151NOS/?image=large

NEVER RUN A DRY NITROUS SYSTEM ON A TPI ENGINE THE COMPUTER CAN<T SUPPLY THE CHANGE IN REQUIRED FUEL FLOW DEPENDABLY
Dry =your engines Injectors add fuel as the oxyegen sensors see the fuel ratio change
Wet = your Nitrous spray Nozzles add fuel in a fog, of fuel with the nitrous ,
WET SYSTEMS ALMOST ALWAYS WORK BETTER AND HAVE FEWER PARTS SELF DESTRUCT


WATCH THIS

http://www.streetlegaltv.com/forum/nitr ... -3389.html

 

[stroker87]

its a huge differance in "looks" I have not ran it but i'm sure it improves air flow to the heads

now i'm thinking I should of waited on this one to "see" for myself what this simple mod done, doing all these things at one time I hope make a big out come in the end :mrgreen: new cam, HRS tweak, tweak the heads a little more, degree the new cam should make it alot more fun to drive and maybe pull a fast one on some of the guys :twisted:

 

[grumpyvette]

Ive spent YEARS testing different intake configurations, engine compression ratios cam designs injector sizes, different plenum designs and porting tweaks, on many intakes ESPECIALLY the
stealthram when I say what mods worked out well., its due to experience

btw

that leaky crap that results from use of the flimsy paper upper intake gaskets, drove me nuts at first , you need to get a new gasket and use it as a pattern on some rubberized canvas gasket sheet to cut new gaskets that are about 1/8" thick then use weather strip adhesive in a light coat on one or both sides of the gasket

you simply place the gasket on the sheet material, spray it with a light mist of black paint remove it and cut out the area the original paper gasket prevented the paint from hitting the rubber surface on.

many hardware stores carry that gasket material in 6" or 12" sq sheets

http://solutions.3m.com/wps/portal/3M/e ... 36F0RRQPbl

http://www.allstategasket.com/info_gask ... e-1500.asp

if your planing a nitrous power enhanced engine read these links

http://kb-silvolite.com/article.php?action=read&A_id=7

http://victorylibrary.com/mopar/nitrous-tech-c.htm

http://www.streetlegaltv.com/forum/nitr ... -3389.html

http://www.akamoto.co.uk/info/Nitrous-cam-shafts.htm

http://www.kennedysdynotune.com/Nitrous ... 20Tips.htm

http://www.nitrouskits.co.uk/Technical/cam-shafts.htm

http://www.themotorbookstore.com/nitrous-oxide.html

http://www.starracing.com/nitrous_oxide_general.htm

http://www.idavette.net/hib/nitrous.htm

http://www.nitrousexpress.com/Pages/carb_faq.htm

as a general rule adding nitrous adds a much higher volume of exhaust flow and heat, so you'll benefit from a low restriction exhaust and a cam designed for nitrous use,and a high flow fuel system and a larger cooling system and a high flow single plane intake design,and having an ignition that can be retarded easily from the drivers seat during nitrous use and returned to the original ignition advance, when not using nitrous

IF your thinking of installing a LT4 intake on the first generation small block chevy engine theres a few required mods that will be necessary.
I really hope you took the effort to read thru the links and sub links so you understand the changes required to get that lt4 style intake to fit and function.
obviously youll need the matched throttle body, injectors,gaskets, sensors and fuel rails and connections
obviously you'll need a crank triggered distributor-less ignition or modifications to use a distributor,THAT FITS AND CLEARS THE INTAKE and mods to route coolant flow to the water pump and block that the current LT4 intake was not designed for but can be modified for.

http://sethirdgen.org/LT1.htm

viewtopic.php?f=70&t=5916&p=18181&hilit=+ignition+coil+plug#p18181

viewtopic.php?f=55&t=1052

http://www.popularhotrodding.com/tech/0 ... rsion_ls1/