Professional products vs Fast vs LS6 intake numbers
Hey guys so i got my LS1 out of my 89 FC RX7 setup on an engine dyno on sunday and also figured that while we were at it we might as well test the Professional Products intake manifold (mine) vs the LS6 manifold and the Fast manifold
the motor is a stock bottom end 2001 LS1 with the following
TSP MS3 cam
ARP rod bolts
stage 2.5 5.5L ported.CNC'd heads combo from TSP with upgraded valvetrain
Professional Products 96mm intake manifold
RevXtreme 95mm throttle body
36# flow matched injectors
JTR 1 7/8" longtube ceramic coated headers
tuned on HPTuners prosuite
made 526HP @ 6900rpm and 447FT/LBS @5200rpm... I'd say thats pretty decent for about 3500 bucks canadian, i am pleased with the numbers... and going in my 2700lbs car it will be a rocket!
so after we finished the tuning on my setup we figured we'd test against the other common intakes since it only takes like 20 min to change them out so they could be all dyno tested under the exact same conditions
here are the results
stock LS6 intake with stock LS1 78mm throttle body - 517HP 450TQ (blue line) about 200 bucks
my setup listed above (red line) about $800 w/ manifold and TB
Fast 92mm intake with 90mm throttle body - 535.6HP 459.2TQ (black line) about $1200 or more w/ manifold and TB
Nice info, but why choke off the LS6 w/ a 78mm TB, when the other two were tested using much larger throttle bodies?
__________________ LSX MUNSTER (99-NB-MX5)...5 lbs/HP...*Direct RAM air*...Mamo & Pat G engine airflow mods...Aero body mods...Originally completed in 2003, [1 of 1]
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Ide love to see an LS2 intake vs the Professional products. From what ive seen the ls2 makes more power.
As does a 90mm LS6.
__________________ LSX MUNSTER (99-NB-MX5)...5 lbs/HP...*Direct RAM air*...Mamo & Pat G engine airflow mods...Aero body mods...Originally completed in 2003, [1 of 1]
...Friend to all car people...Thanks LS1Tech
1966 Galaxie 500 Hard Top restomod...460cu. (7.5L)...5-Speed ZF-S5-42, [1 of 1]
Nice comparo, but I have to say that LS6 intake is doing very well even if it has a stock 78mm TB! Would love to see the LS6 opened to 90-95mm one day against those intake. I know its been done, but never in a good comparison like that...
I am satisfied with the excellent comparison. Some people are never happy, but I am quite impressed with the effort. Engine dyno numbers a LOT HIGHER then chassis for sure. Still an excellent comparison.
__________________ 2000 FRC LS2 402 - Tuned by Vengeance Racing #'s after rebuild complete
TFS 215's, Custom Cam, 1 7/8 ARH, Ported FAST 102, UD Pully, NEW 2012 EWP
RPS Street Twin Lite, Pfadt Coil overs, Sways, bushings kit, RPM Stg III diff
Tick Master. *** Performance needs:Vengeance Racing678 513 7105 http://www.ls1tech.com/forums/dynamo...s-results.html
I'm amazed how the fast builds power everywhere, usually people say they lose power down low, I know my car felt stronger everywhere, especially above 4k rpm
would be awesome to see the tpis ls6 and ported fast thrown into the mix too, but this was awesome either way!
__________________
LS1, EPS 230/238 113+2, hand ported 799s, ported FAST 90/90, Doug's headers, ud pulley, 4l60e Yank SS3600, 3.42 12 bolt
Great comparison. Looks like the Pro Products can hold it's own above the LS6 and compared to the FAST, despite what the common concensus is among this board. Seems to me that a LS6<10hp<FAST difference is easily worth the money.....This coming from a ported FAST owner.
Once factor I would have liked to see was the heat differences, to prove/disprove the Pro Products heat soak issues, or lack there of.
__________________
2008 G8 GT
2002 Formula Firehawk #1072
2002 TA WS6 - ASC #12116 - Sold 12/12/2010
1998 Formula - Sold 11/15/2011
This is a great post!!!!! I have been waiting a long time to see this combo on a engine dyno,since its basicaly what im running.Great Job.The fast has really good torque on the heads and cam setup,compared to the other two.Looks to be about 15 ft lbs at 4500.
ya the reason for the 78mm TB on the LS6 manifold was cause we didnt prepare for this test and kinda just decided to do it with what we had lying around the shop after tuning my setup
and as far as the heat soak issue... my motor was run hard for about 2 hours doing the tuning with the Pro products manifold on before doing this comparison so it was really very warm haha... whereas the other two were nice and cool and run as soon as they were strapped on
no doubt the FAST is far superior to the other two over the entire curve. however i do think the the pro products may have made a few more ponies if it had been cool like the other two... either way its some good info i thought i'd post up since i know it has always been a big question for many LS guys
Professional products vs Fast vs LS6 intake numbers 
...Friend to all car people...Thanks LS1Tech
tsp 370 2.5 ls6 ms4 150 wet shot
