i have a 355 with all forged bottom end flat top speed pro pistons, kenny duttweiler signature heads, trickflow 480/498 (or something like that) cam, trickflow 1.5 roller rockers, among many other things. its the 420hp kit that you can buy from summit. ive been thinking about puttin that motor in my 87 tpi camaro. can anyone tell me if this thing is gonna run good or like ***. how much power should it make on all the stock 305 tpi stuff considering it pushes over 400 on carburation. i wanna stay away from spending alot of dough on it cuz all my money goes towards my '00 z28. but id still like to keep it tpi if it will run decent. any help is appreciated.

 

What are the duration numbers on the cam and the lobe seperation number. The cam numbers will determine if it will run decient.

 

here are the specs on the cam:

Brand: Trick Flow Specialties
Product Line: Trick Flow Track Heat Camshafts for Small Chevy
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 2,700-5,700 RPM
Intake Duration at 050 inch Lift: 228
Exhaust Duration at 050 inch Lift: 234
Duration at 050 inch Lift: 228 int./234 exh.
Advertised Intake Duration: 284
Advertised Exhaust Duration: 290
Advertised Duration: 284 int./290 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.494 in.
Valve Lift with Factory Rocker Arm Ratio: 0.480 int./0.494 exh. lift
Lobe Separation (degrees): 110
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No

 

ok TPI guru's. someone steer me in the right direction.

 

i used to want to put a tpi on my 355(which isnt built yet but will consist of 200cc brodix aluminum heads with forged speed pro flat tops with a holley stealth ram up top) and the cam you have seems like it would fit the holley stealth ram very well. and buying the stealthram is alot cheaper than upgrading the tpi unit with runners and base.

 

doesn't sound too bad. you need those numbers for when you go to make the chip. and it will be a mean motor with the tpi but it may starve for air bit at the top end.

 

cam is slightly large for TPI...especially STOCK tpi...

if you can port out the stock base.. and plenum. if not, your gonna need to tune it to run right. 110 lsa is abit tight but can be tuned to work. cam like that will tend to make decent power down low but wants to breathe up top where TPI dont allow it to. it will peak in the 4500 area but flatline till around 5000-5500. thats what bigger cams do in TPI LTR setups. could have potential to make some decent power even with stock stuff if you can tune it right. I've seen L98's with exhaust/airbox mod with ZZ4 cam make 250whp untuned. and ZZ4 is mild. i seen LT4 hotcammed motors make abit more on stock heads and TPI. Hotcam is about as large as u'd like to go on stock TPI and stock heads. runs somewhat ok without a tune but definately wants one or fuel pressure changes.

if you dont tune it, it wont run good at all...idle like crap and hesitate alot.

 

you mentioned a L98 with that cam making 250whp but will the peak still be at 4500 and flatline till 5000-5500 even with the trickflow heads? this engine is in my truck right now and it pulls to 7000 but thats with a 750 cfm carb and a dual plane air gap intake. what is the cfm of stock tpi by the way?

 

i have the lt4 hot cam in my 383 and i sounds nice and idles great. two thumbs up!

 

i've seen ZZ4 cammed cars with stock TPI make 250whp, but i also seen full bolt on cars make the same power. they peak around 4200-4500 and fall off beyond that.

when u run bigger cams with TPI, like cams that want to make peak power at 5500-6000rpms in carbed manifolds or miniram/LT1 short runner manifolds, the power flatlines. Its all about the TPI pulse resonance of the intake air charge. its suited for 0-5000rpm use. mainly making power in the 2000-4500 range. beyond that it simply falls on its face and cant get more air in. Bigger cams will help push more air in at higher rpms, but your just flatlining or holding power longer, instead of making more power with those climbing rpms

even with aftermarket heads, powerbands will flatline out, holding peak power from 4500-5500 in some cases..depends on the cam/etc.

 

"its suited for 0-5000rpm use. mainly making power in the 2000-4500 range. beyond that it simply falls on its face and cant get more air in."

I agree , have ZZ4 cam and springs in 100K L98.
Saimised stock base and SLPs , home ported plenum and long tubes.Custom chip.
58mm TB made no difference over stock 48mm
Great bottom end , pulls 1.7X's on ET streets
Over 5K it just flattens out.
Will make it to 5500 but best times shifting 4500-4800.

 

well it sounds like im gonna need an upgraded intake in order for this engine to run good. i wont be able to handle it peaking out at that low of rpm. what do you guys think would be a good route to take as far as intake selection?

 

Holley Stealth Ram, or TPIS MiniRam would be the best choice for topend

 

wow i just checked on prices on those and those things are crazy expensive.

 

check the classifides board.. theres a used and complete holley stealth ram in there for sale right now..

 

will a holly stealth ram even fit under the stock hood?
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i found the super ram but i didnt find the stealth ram. can you give me the link to the thread?

 

I've seen stealth rams under trans am and camaros. Camaros have a bit more stock hood clearance I think. I'm looking into a stealth ram also, have you checked out www.stealthram.com?

 

yes i have and after seein that, im kinda interested in an lt1 intake. theres alot of LT1 guys around my area and im sure i could get one cheap and have it sent off to be moddified to fit but i just emailed scott@lt1intake.com and i got an auto response saying that hes too busy for his web business right now.

 

buying an LT1 intake and having it sent off to be modified, may be just as much if not cheaper to go Stealth Ram.

 

how do you figure? on stealthram.com it lists the lt1 for 550 and HSR 654. and 400 for the lt1 is just the intake alone. if i supply the intake, thats 200 bucks off right there. correct me if im wrong.

 

most LT1 intakes can be found for 80-100 bucks or so with rails. then you gotta convert it over and buy the necessary adapter parts for it. AND you'll still need fuel lines made up.. you can buy custom ones for 120bucks or have a shop make some for you if you supply the ends. then you gotta run the coolant lines

i got a manifold for about 100 bucks, and it would cost about 280 to have it converted with all the necessary parts to make it work. That is thermostat box, throttle cable bracket, i forget what else. But that didnt include the lines for the coolant system. You'd have to run those lines somehow.

But overall it is possible to get it done for less than Stealth ram. But i'm thinking stealth ram is worth the money tho, over a LT1 intake.

 

are yall comparing used LT1 intakes to Brand new HSR prices?? Used HSR's sell for cheap, AND they are direct bolt ons.

 

you still have to run the fuel lines on the hsr as well but, you could flip the rails around like I did and buy the fuel line repair kits from th eparts stores and just bend those up instead. (looks like a direct tpi replacement)

I even thought about buying the flaring adapters if there was enough HSR owners who wanted a factory look. which is much cheaper than buying the
-an fittings and hoses


the mini ram would be a great intake but the price is kinda out there

 

where can you buy the used hsr for cheap? i havnt found any but maybe i havnt looked hard enough.

 

check the classifieds in this site, people sell them quite often.

 

https://www.thirdgen.org/forums/sear...earchid=570086

 

yea that link definitly does not work.

 

thats funny, it worked when I posted it. perhaps the search url has a time out? try this one, I used it twice to ensure it works;

https://www.thirdgen.org/forums/sear...earchid=571972

 

i must not be gettin to it in time cuz i couldnt get that one to work either

 

I just read a post about someone selling a HSR used with fuel rails for $250.