http://www.lt1intake.com/dyno.htm

 

Damn...sounds like a TPIS ad....

I'm not knockin' what you're doing, but a cam swap should have been included in the title of the post.

 

No way a cam gave the 52 RWHP alone. The LT1 intake is alot of it. Besides you should match the cam to the engine in all fairness.

I see what you mean and edited the title of the post.

 

hehe i think the 16 lb ft lost was worth the tabletop like trq curve.

 

Is this from a stock head 5.7L tpi engine?

 

Hyvin työntää Samilla takafillareista.

Jari

 

I was just saying the same thing to myself - sums it up.

 

Yes.

 

nice.
now lets see how it does on a stock 305, which is where i think alot of these intakes are going.


on a side note, why are the graphs crossing at 4k instead of the normal 5200rpm?

 

Look at the scales on the left and right of the picture. They didn't bother to keep the scales the same for torque and HP. The 2nd dyno screen capture has them balanced out, and it looks like the graph crosses right at 5,250 like it should.

John, I've been deliberating on the swap, and you pretty much just sealed it for me. The cost of a completely upgraded TPI setup is more than the cost of converting to a LT1 intake. Specially when I consider how much money I can get for my AS&M SS runners.

What were the complete specs on both setups? Intake to tail pipes, was the ECM tuned for the LT1 intake, or was that the previous tune on the car?

 

I like the results, however I am a little disapointed that we don't have results from an completly stock engine and no cam change.

Anyway, great job.

 

K .... to the experts don't be offended by this



IS that with a MAF ? Also as, I keep learning about the TPI and what it will do( computer and the intake ) ......I keep hearing you don't want to go over 210 on the intake side for a street car . I myself would love to run big cam like that ..... geese is would be one of the cheapest parts on my car LOL . I am just worried about doing it with a MAF system , oh yeah ....and STOCK heads . My *** to be able to pull them numbers with my stock heads ...... that would be sweeeeet ! I have seen a couple guys run the wrong cam ( actually considerably less than the greater cam in that scenario and a stealth ram) and get realllllly bad results ( less than a 13.9 1/4) .


I am almost out the door buying a big cam ....and a LT1 intake

...not to hyjack this thread or anything ..... just trying to understand it all.

 

Now I need a cam. John, let us know the results of Tom's swap as well.

 

-Stock bottom end
-Stock iron heads, gasket matched and 30 cut out valve job
-Stock throttle body bored to 52 mm
-K&N filter (RC-5000)
-Airfoil
-Comp Cams extreme energy 224/230 112 LSA (08-503-8) (LT1 intake only)
-Flowtech headers and y-pipe
-edelbrock cat-back without cat
-MSD 8.5 mm plug wires
-Accel ignition module
-Halltech e6gm

Halltech works with MAP sensor so he doesn't have MAF anymore.

 

Tom has ran into trouble and couldn't go through with the swap in a stock 350 yet.

 

I don't think the majority are going on 305's. I think most of my customers have 350's or 400's.

 

Has anyone put a TPiS Miniram on a stock L98? TPiS claims a 95hp (I believe ??) increase over the stock L98. Has anyone done this swap and gotten dyno results?

** - Just checked there website, here's what they claim - "This fabulous one-piece casting is ideal for the serious car nut. If used as a replacement over a stock Tuned Port intake, on a mild 350ci motor, you will see a 75-95+ HP gain. " - Has anyone done this?

It says if done on a mild 350, but then in the next line it says "if you build the motor on the mild side, i.e. cam etc...". So I guess they consider the mild 350 in the first paragraph is a stock 350. - **

 

TPIS gets 95hp by being able to flow air past the limit of LTR TPI. It doesnt mean your 240hp L98 will have 335hp after the swap. It jsut means at like 6500 rpm it will make 95 hp more than the TPI setup...

 

.

 

Well since everyone wants to see a 100% stock L98 with a Lt1 swap I guess Ill offer mine up

100% stock, runs 14.4s and as fast as 14.25@ 95, not even a K&N!!

 

Well said.

 

John, just thought I'd publicly post this question as maybe a few others will have the same question later, or will have asked it. A search hasn't turned up anything so I am posting.

I know you mentioned that a LT1 intake from a 93 LT1 engine will not work due to the fuel rails. Is that limited to an F-body LT1? I found a LT1 intake for $40 with fuel rails, injectors and computer of a 94 or 95 Impala SS. Haven't bid yet as I'm waiting on your response.

Not that I need the computer, but if the bid stays low then I can later sell the computer to someone who may need it. Or just give it away.

 

A search at my website would have gave you the answers under the FAQ questions.

All LT1 intakes and fuel rails are the same ('94-97). It doesn't matter if its from a caprice, Roadmaster, Camaro, Fidebird, Fleetwood, etc......only the Corvette uses differant fuel rails but i am sure you won't see these for sale anywhere, I never have.

What you have to be carefull of is the L99 intakes, they were in none f-bodies and were a 4.3L V-8 intake that looks exactly like a LT1 with exception of the port sizes. I have the pictures and castings numbers at my site also.

E-mail me for any questions that don't pertain to this post.

 

Nice efforts and all in the test, good work.

However the results are bunk and not even comparable with a cam swap being part of the deal.

The only way to have had a real deal comparo would have been to have kept the cam and then looked at AVG TPI Power AVG LTI Power.

 

Chalk up another vote for my guinnea pig

 

hey john... let me ask you for your opinion. i plan on swapping out my tpi with a lt1 intake... but should i change my cam or leave it? i have a comp cams "extreme energy" cam (08-502-8), 218 / 224 .495 / .502 112 LSA . would i make more power if i switched over from the 502 to the 503 cam with the lt1 intake?

 

Run the 503 only if you have a full exhaust, custom chip and of course upgraded intake like the LT1. Ported stock heads or aftermarket heads would help alot too.

 

i have ported heads and full exhaust... guess my website on my sig can tell you more about all the mod's ive done. if i went with the 503 cam and the lt1 intake, with the rest of the mods i have, at what rpm should i shift at, and what size stall tc should i get? i appriciate all your help

 

Oh I forgot to mention the stall. Comp Cams says you need at least a 2000 stall with the 503 cam. I would even consider more like a 2400 or better. I myself run a 9.5" 3000 stall and it is great on the street.
I can't tell you what to shift at unless you show me a dyno run of your engine. Typically you want to shift a couple hundred rpm below the where you make max HP.

 

This is really encouraging I'm still a bit skeptical with stock heads and flow tech headers , but it certainly is some good numbers I can't wait to get my AE tuning closer so I can run full timing and lay into it without my knock sensor going nuts.


dj haf, you could run either cam, I had the 502 w/ 110 LSA. I originally thought the cam was with 112 LSA and I wanted to take advantage of the new heads, so I bought the 503. The 503 is quite a bit less streetable, but shouldn't be too difficult to tune around. As my car sits, it bucks going up hills if you keep it in OD at 40mph with the stock 3.27 gears. Then again I've still got a lot to learn about burning proms. I would say a 2000 stall is an absolute minimum and would go for a 2800 or 3000. If you've got a 350, you'll be probably be shifting around 6000rpm with everything flowing well enough.

 

it's that, i need to get a tranny and tc right now because my tranny is ready to go. i want to be able to give them an answer when they ask me where i want the shift points. i plan on going with the lt1 intake, a 2600-2800 stall converter, 503 cam and my ported heads. i guess it would be safe to tell them to make my shift points at 6k? thanks guys

 

Added the video of the dyno to the link in the first thread.

 

Has anyone done the LT1 intake swap on a 305 with results yet?

 

Whenever my intake arrives, I'll have results...

 

12.0 sec stock TPI intake


https://www.thirdgen.org/techbb2/sho...hreadid=249945