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i have a ls2 making 395.8whp @5790 and 378.1@5021 wcf on mustang dyno with small cam 95mm throttle body and underdrive pulley i dont really know what is inside the engine as i bought it used i know it was rebuild fresh so i thought it was 100% stock
this engine have really good powerband that everyone that drive it or ride in it first thing they would notice is how responsive the engine is, this engine is in a drift car so the low end torque is more important than high end
im thinking of installing fast intake 102mm cause it seems easy install and maybe 30whp at most? but will i lose low end? let say my ls2 intake is ported would i gain anything going with 92mm or 102mm fast intake
there is no real reason to make an upgrade other than to practice tuning ecu more and as you know its never really enough horsepower even though i dont really need more horsepower this year but i want to consider my options for next year. i might go with afr 245cc heads and btr stage 3 or 4 cam and higher compression later but not sure how much low end would i sacrifice i read Richard Holdener article comparing 317 ,ls3 and afr 245 heads with 239/255 cam and the afr head didnt really lose low end but not sure about the cam i dont really want to swap cam only to find out im make the same power or maybe less.
and i might try 200 shot with e85 later for drag racing for fun but i have no plan for blower or turbo.
other than e85 and fast intake is there any easy whp that i could make this year
The stock LS2 is the worst performing out of the stock intakes. Porting might help a little, but you should see big gains with a FAST intake. If you want to stick to a budget, you can switch to a gen 4 style truck intake and pick up BIG in the torque department. Early testing on the Dorman LS2 intake shows that it performs about as well as the gen 4 truck intake, but is more expensive (~$400).
The stock LS2 is the worst performing out of the stock intakes. Porting might help a little, but you should see big gains with a FAST intake. If you want to stick to a budget, you can switch to a gen 4 style truck intake and pick up BIG in the torque department. Early testing on the Dorman LS2 intake shows that it performs about as well as the gen 4 truck intake, but is more expensive (~$400).
i dont have enough hood clearance for truck intake or i would have considered fast truck intake, holley sniper intake seems to have longer runner than fast and i think it would still clear the hood but i dont know how it compare to fast intake, i checked richard holdener article of when he tested 20 intake on ls1 fast 102mm seems the best option the gain is 35hp and didnt lose low end compared to ls6 intake which i think is the same as ls2 but that after changing from 78mm to 102mm throttle body so idk
LS6 intake makes more than the LS2. Most dyno tests with an LS2 intake show that they make about the same power an as LS1 intake.
Dorman LS2 intake uses a FAST lower shell and makes the same power as the Gen 4 truck intake/TBSS intake. It'll be your best bet for a direct swap without having to make any changes and its also half the price of a FAST.
LS6 intake makes more than the LS2. Most dyno tests with an LS2 intake show that they make about the same power an as LS1 intake.
Dorman LS2 intake uses a FAST lower shell and makes the same power as the Gen 4 truck intake/TBSS intake. It'll be your best bet for a direct swap without having to make any changes and its also half the price of a FAST.
thanks , is there any way to tell dorman and ls2 intake apart?
thanks , is there any way to tell dorman and ls2 intake apart?
The Dorman has a lot of text and markings molded into the manifold. Post #207, #151 & #152 have a lot of pictures of a Dorman LS2 intake. The thread has a lot of info on the D LS2
interesting richard holdener article show ls6 intake with 78mm throttle and tbss with 90mm so i dont really know how would they relate on 95mm throttle but i like how lsxr intake make 30whp more than tbss with minimal torque loss at 4000rpm but how much of that is because of the throttle, fast intake still gets my attention the most im gonna try to find more info about ported dorman intake
Stock LS6 eBay Price: $195 Construction: Composite Runner Length: 11.0 in Throttle Opening: 2.960 in Throttle-Body Size Tested: Accufab 78mm Fuel Rail: Wilson Billet Injectors: Holley 75 lb Peak Power: 557 hp at 7,000 rpm Peak Torque: 483 lb-ft at 5,000 rpm Ave HP (3,000–7,000): 432.0 hp Ave TQ (3,000–7,000): 450.9 lb-ft TQ at 4,000 RPM: 454.3 lb-ft
Stock Trail Blazer SS eBay Price: $210 Construction: Composite Runner Length: 9.5 in Throttle Opening: 3.45 in Throttle-Body Size Tested: FAST 90 mm Fuel Rail: FAST (modified mounts) Injectors: Holley 75 lb Peak Power: 562 hp at 7,000 rpm Peak Torque: 497 lb-ft at 5,000 rpm Ave HP (3,000–7,000): 444.4 hp Ave TQ (3,000–7,000): 464.6 lb-ft TQ at 4,000 RPM: 469.5 lb-ft
FAST LSXR 102mm Retail Price: $951 Construction: Composite Part Number: 146302 Runner Length: 10.5 in Throttle Opening: 3.970 in Throttle-Body Size Tested: FAST 102mm Fuel Rail: FASAT Injectors: FAST 75 lb Peak Power: 591 hp at 6,900 rpm Peak Torque: 505 lb-ft at 5,700 rpm Ave HP (3,000–7,000): 450.0 hp Ave TQ (3,000–7,000): 468.4 lb-ft TQ at 4,000 RPM: 466.4 lb-ft
FAST LSXRT 102mm Retail Price: $999
Construction: Composite Part Number: 146602 Runner Length: 10.5 in Throttle Opening: 3.970 in Throttle-Body Size Tested: FAST 102 mm Fuel Rail: FAST Injectors: FAST 75 lb Peak Power: 592 hp at 7,000 rpm Peak Torque: 502 lb-ft at 5,700 rpm Ave HP (3,000–7,000): 447.8 hp Ave TQ (3,000–7,000): 466.0 lb-ft TQ at 4,000 RPM: 464.3 lb-ft
A lot of the fast 102 benefit is plenum volume in addition to the bigger throat. If you are loooking to upgrade heads just jump to the fast102. I seen guys do decent even with stock heads and cam with it. Be selective on your throttle body. The F102 throttle is notoriously difficult to tune. Most recommend the nick Williams 102. Holley 105 throttle also seems to do good.
I have a friend with a Trail Blazer LS2 in a '69 Camaro that laid down 440 WHP on Mustang dyno through the 4L70E trans. Only mods are ported GM LS3 heads, stock LS3 intake, and a very mild GM LS6 cam. 1/4 mile trap speed is about 116 - 118 mph so numbers appear to add up.
A lot of the fast 102 benefit is plenum volume in addition to the bigger throat. If you are loooking to upgrade heads just jump to the fast102. I seen guys do decent even with stock heads and cam with it. Be selective on your throttle body. The F102 throttle is notoriously difficult to tune. Most recommend the nick Williams 102. Holley 105 throttle also seems to do good.
honourable mention to the MSD too. I believe it has even more plenum volume than the fast
A lot of the fast 102 benefit is plenum volume in addition to the bigger throat. If you are loooking to upgrade heads just jump to the fast102. I seen guys do decent even with stock heads and cam with it. Be selective on your throttle body. The F102 throttle is notoriously difficult to tune. Most recommend the nick Williams 102. Holley 105 throttle also seems to do good.
i had 102mm throttle body but it looks like a ebay generic fast throttle body to me, it pissed me off that the tuner removed it and installed 95mm and charged me about 500 without asking me i hope that the 95mm is better at low end torque and doesnt lose much at the top, does anyone know the average gain loss from 95mm to 102mm
i just emailed tony mamo and he recommeneded 102mm fast and mms 220 for my setup i guess this is what im going with.
I have a friend with a Trail Blazer LS2 in a '69 Camaro that laid down 440 WHP on Mustang dyno through the 4L70E trans. Only mods are ported GM LS3 heads, stock LS3 intake, and a very mild GM LS6 cam. 1/4 mile trap speed is about 116 - 118 mph so numbers appear to add up.
i really feel like i should change the heads first when ever i read about ls3 heads making large numbers
i had 102mm throttle body but it looks like a ebay generic fast throttle body to me, it pissed me off that the tuner removed it and installed 95mm and charged me about 500 without asking me i hope that the 95mm is better at low end torque and doesnt lose much at the top, does anyone know the average gain loss from 95mm to 102mm
i just emailed tony mamo and he recommeneded 102mm fast and mms 220 for my setup i guess this is what im going with.
That would be a really solid setup another one to look into instead of the LS3 heads are the TFS 220 as cast touched up by Brian Tooley. There is a ton of info out there on how to get to the 500hp mark just takes a well thought out build.
Just the basics you need to know. I'd cheaply have the heads you have ported for about a 1000 and milled. Cam and intake change with a good header & exhaust. Would be close cheap!
08-16-2018, 07:24 AM
how much more whp can i make n/a on ls2 400whp 
