I have not dynoed the car, or gotten any vallid track results since I installed the crane 119661 roller cam,and the 11:1 cpr pistons, but when the car had an erson E119824 roller cam and 10:1 pistons the the stealth ram equiped engine ran consistant 12.1-12.17 at 114mph N/A, and the nitrous of course depending on when it was engaged improved that, since I installed the higher compression pistions and crane roller the cars noticebly faster N/A.keep in mind I DESIGNED built this engine COMBO specifically for USE of nitrous and to run in the 4000rpm-6300rpm range with the STEALTH RAM ,NOT to make good HP/TQ N/A but Ive not been able to get vallid times,Ive twisted off 3 u-joints,useing borrowed slicks and destroyed both halfshafts and busted the 700r4, trying, and the street tires go up in smoke, Ive purchased a 4L80E and Im looking for a good deal on a trans controller now, for the trans swap,the vettes going to need that before, Ill have data,
I hope someone can post a graph of what DD-2000 shows for both ENGINE combos youll see the differance, the stealth ram was a huge improvement over the ported TPI.





[Modified by grumpyvette, 6:09 PM 8/1/2003]

 

What would you consider using in DD-2000 as intakes though? There are no entries for Super/Stealth/Mini rams. Isn't there only single/dual planes and TPI?

 

I personally would not put too much stock in those DD programs.

Before I ever ran my car, Corkvette and I played with it. As many of you know our setups are identical with the exception of the headers. Mine 1 3/4 and his 1 5/8. According to the DD programs it figured me for .4 sec slower than Corky's car.

The first time out to the track we both ran dead nut the same ETs with mine slightly quicker. We then took the test if you recall a set further. I took my headers off and at the track after a few base runs he switched headers. He gained maybe .05-.07sec. But the gain was pretty much neglible. But it definately did NOT loose .4sec as the DD indicated it would.

Guess the bottom line at least for me is the computer programs, while nice to look and play around with, are far from real world tests.

The test like above and what Beach is about to do with the HSR is a good indication of power. And I have to agree with him also, that track times are really all that matters. Even dynos vary power output numbers too much.

Both guys like Corky, Beach, Ralph etc have run their current setups soooooo frequently with near exact results and know exactly what they should run in different types of weather. I think its fairly certain we can say if they have a gain and they say they picked up, then they picked up. The rest of the testing devices are pretty much non-comparible tests.

Just look at my first dyno with decent weather to 3400' DA and on a different dyno. The HP/TQ swung 37 HP! Hardly a good comparison tool when you might only gain or loose 10hp. Lets just say the capability with that kind of varience in a test is far from perfect.

Just my $.02. :cheers: :thumbs: :lurk:

 

Grump, What does this mean? ported trickflow 200cc heads, )(about 210cc now and flow similar to AFR195cc heads))
The Trick Flows don't flow as much or aren't as efficient as the AFRs? :confused:

Somebody host Jussi's pics. If it's the intake I'm thinking it is it's pretty trick. :skep:

:seeya

 

"Grump, What does this mean? ported trickflow 200cc heads, )(about 210cc now and flow similar to AFR195cc heads The Trick Flows don't flow as much or aren't as efficient as the AFRs"

IM running the twisted wedge trickflow heads and they are extensively ported, they flow slightly better than the AFR heads do... unported, did you notice that right out of the box the trickflow heads flow better on the exhaust ports even before port work,... and that the trickflows are within 13cfm at the WORST point and MUCH closer over much of the flow curve even UNPORTED
heres what they flow UNPORTED



while I totally agree that the trickflows are not as good out of the box , after porting they flow slightly better, now of course a port job on the AFR heads will again bring them above the trickflows but youll be surprized at how close the flow numbers are!





[Modified by grumpyvette, 4:13 PM 8/1/2003]

 

I like programs like Desktop Dyno, they're fun to play with, but they are very hard to get accurate with TPI motors.... a lot of fiddling needs to take place. Ralph seemed to get it dialed in a year or two ago, where is was kinda of predicting fairly accurate numbers with the torque curve at the right amplitude and peak rpm. Problem with it is that it just doesn't get it with TPI long runners, and that they make a tremendous amount of low to midrange torque. You can get the HP peak dialed in fairly easy though.

Will be interesting test with the Stealthram. In 800 foot DA I have run a 1.52 60 ft, Saturday will be in the neighborhood of 2000 feet, thus with the Superram with a good hook pass, I would run between a 1.56 and 1.58. I'd like to see the Stealthram get 1.60-1.62 60 ft with my 3000 rpm converter and 3.45 gears, thus in order to out perform the SR, it will only require approxmiately 2 more mph. However, if I can only muster high 1.6's or low 1.7's out of the Stealthram on a good hook, then its going to require a solid 3-4 more mph to catch the Superram.

I'm hoping to see 118 mph out of the Stealthram tomorrow with the low 1.6 60 fts. This would mean in better cooler fall air, I could possibly bring in a 120 mph pass out of it, which would be pretty neat with a 383 with less than 10-1 cr, 219 cam and iron heads that flow in the 250/190 area. I'd "really" be pleased if I could break into the 1.5's on the 60 foot with it.

I haven't really studied the Stealthram yet and any proven combinations out their with it besides the Fbody test GMHTP did, which is not very impressive at all for the Stealthram if you ask me, but if its the meeting of the MR and SR, then I should gain somewhere around 25 HP with it, but lose somewhere around 25 ftlbs of torque with it..... dunno.

Stealthram is on and Motor is readied to be fired, but drained the oil and discovered I was out of oil in the garage, will get some fresh oil and filter tonight and fire it up.

cheers,
Beach Bum

 

:thumbs: :cool:

 

Send me the pics and I'll put them up for you.

zad54@bellsouth.net

 

i cant wait :smash: :cheers:


[Modified by CORKVETTE1, 6:03 PM 8/1/2003]

 

:lurk:

 

Cork, If he picks up .2-.3 tenths, think they will sell two more? :D :thumbs:

Com'on Beach, pull through for us!

:cheers: :blueangel:

 

I've started it up, no problem, fired first key turn. Thing idles better than the SR ever did.... dunno why, just got lucky I guess. I've taken it around the neighborhood twice, but haven't really done anything with it besides a couple of quick punches to 4500 rpm. Rush hour here right now and here in Southern California, you really don't have too many places to go running around.... no country roads. But tonight I will take it to my favorite industrial park and run it up to 6500 rpm.

I have the timing advance set at 10 degrees initial right now, will continue to advance until detonation occurs. The SR wins in the throttle response area, the Stealthram doesn't have that initial kick like the SR, but maybe it needs more timing, and in addition, I haven't taken it above 5000 rpm yet, which is where its supposed to shine.

Not sure if I can race tomorrow though.... I don't trust the fuel line connections right now for a 150 mile trip, and the connection I trust the least is right in front of a header.... not a good thing. Need to find the right fasteners. Also, I am forced to use a remote coil, and don't really have a good place to mount it, simply have it half butt tie strapped above the valve cover right now. Have a couple of other small things that need proper fastening as well. Wish I had time to fix it tonight, but have other plans. But I'll try in the morning.

later
Beach

 

Todd, what size injectors, throttle body and TPS voltage did you have previously? I set that TPS to .51 I think. The TB is 58mm. How is fuel pressure reading?

 

below 4000rpm your correct the super ram wins the torque curve, ,but keep your engine spinning above 4000rpm to take advantage of the much better air flow and youll soon see why its a kick butt intake,(ALTHO I THINK YOULL NEED A SLIGHTLY LARGER DURATION CAM TO REALLY SEE THE FULL ADVANTAGE of THAT BETTER AIRFLOW POTENTIAL)


[Modified by grumpyvette, 2:41 AM 8/2/2003]

 

Grump,

What would the specs be of the "ideal" cam for the stealth?

:cheers:

 

"What would the specs be of the "ideal" cam for the stealth? "
HOLLEY tested a camaro with a stock chevy cam in the low 200 degs @.050 lift durration range and gained 62hp with the stealth ram swap, so the intake shows good potential with most cams but in a second test HOLLEY made over 450hp with a cam in the 234 durration range useing the stealth ram, so its fairly obvious that the airflow is available to produce better than average hoesepower, if the cam and heads complement the intakes greater airflow
if you read this article they made 414hp with the stealth ram and a 218/228 durratin cam http://www.gmhightechperformance.com...holleystealth/


theres so many factors involved, like compression ratio,displacement, cylinder head flow,ETC, that question is almost impossible to answer,correctly without knowing all the cars info like gearing, weight,engine components, ETC. but 220@.050 lift would more than likely be toward the lower end of the choices,if the cams Ive tested so far are a valid guide, Im useing a 230 durration cam http://dab7.cranecams.com/SpecCard/D...1=Display+Card

in a 11:1 383 and I feel that its close but not quite ideal for my particular combo, so I will shortly be testing a crower #00471

http://www.crower.com/misc/cam_spec/...00471&x=35&y=9



[Modified by grumpyvette, 4:48 AM 8/2/2003]

 

Well guys, the Game is over..... went to take it out for some 6500 rpm pulls, got 2 blocks from home and noticed the coolant temp rocketing to over 220 degrees.... I started with a cool motor, thing shouldn't even been at 150 yet. Turned right around and went home, started checking out things.... coolant was low, but I had topped it off earlier in the evening. I immediately shut it down and checked the oil..... Hot foamy Vanilla Milkshake !!!!

Tore it down, and my new gaskets were fine, the coolant was simply going over them.... backtrack to a few days ago when I was having fit problems with the manifold....thought I had solved it, but it should have been a warning to me to check it closer..... It didn't seal, I could have torqued them down double the book, wouldn't matter, its not symetrical with my motor. Not sure why.... I have an 70's 350 4 bolt block and Dart 2 heads.

I hope I haven't damaged the engine.... it wasn't doing anything bad when I shut it off. This has never happened to me. Anybody have any tips on cleaning the mess up inside ?

In any regards, I am going to scrap the project and put the SR back on.... I hope somebody else picks the project up, I'll be curious to know how it performs.

Paul, Thanks for lending me the Stealthram !!! Would have been a fun and interesting project if I finished the deal. We'll figure out how to get it back to you via Email.

Oh well.... live and learn.

Grumpy, On picking up 62 HP vs the TPI, I think the Miniram picked up like 90 HP on the TPI.... it just like the stealthram, passed the TPI at right around 4500-5000 rpm. But both gave up quite a bit of torque below 4500 rpm if I recall.

cheers,
Beach Bum

 

Thats a shame. I was really looking forward to hearing your comparison of the SR and HSR.

 

Damn, just damn.
I've had milkshakes(not with this manifold) and just drain, remove oil filter, new filter, fill with cheapo pepboys oil, run awhile and repeat process one more time.
I guess I can pick it up when I go back down to get my motor.
I will put my SR back on and document info. Later I will swap the HSTR back on.
Jeez, I feel bad. Sorry man. Sorry for the mess and time loss. :(

 

Yeah Paul, I too was really looking forward to running it, but I don't think its going to seal, I had problems with it from the get-go trying to get it too fit.
Somebody else had problems with this manifold too, the middle intake holes were offset bored.

I've had a lot of manifolds on my motor and never had a problem like this. Kinda wish I had done one 6000 rpm blast in it my 1st time out, but was rush hour and a million cars everywhere. Maybe a good omen I didn't considering a healthy mix of coolant and oil was my lubricant.

Oh well..... I'm sure somebody else will pick-up the ball and run with it.

I can drop the Stealthram back at your friends shop next time I'm out in that neck of the woods if you'd like.

cheers,
Beach Bum