Intake Manifold Flow Tests: LS1, LS6, TBSS, BBK, Dorman LS2, 102 Fast LSXRT & more
#741
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Wow!
I knew Dorman got after RockAuto for selling the DLS2 for under the suggested price. I paid $310 for my Dorman LS2 back in 2017 from Rock Auto. RockAuto moved the price to something like $447 the same as AutoZone after Dorman pressured them.
Saw a DLS2 listed for $492 on Google.
I'd definitely think used Fast before paying $700+ for a Dorman
I knew Dorman got after RockAuto for selling the DLS2 for under the suggested price. I paid $310 for my Dorman LS2 back in 2017 from Rock Auto. RockAuto moved the price to something like $447 the same as AutoZone after Dorman pressured them.
Saw a DLS2 listed for $492 on Google.
I'd definitely think used Fast before paying $700+ for a Dorman
#742
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HA that's funny. Good think I got one before they jumped up.
Agreed on a used FAST vs a new Dorman. My initial thought was a FAST 102 was "too much" for my simple combo (plus they were hard to find used and still $800+), so I went Dorman. But after recent research (this thread included) and videos from Rich Holdener on YT, the FAST 102 reigns supreme on comparison video it is used in.
For me to go FAST 102 would simply be a curiosity thing if it gains much more than my "ported" Dorman. And if it did at what additional cost.
Agreed on a used FAST vs a new Dorman. My initial thought was a FAST 102 was "too much" for my simple combo (plus they were hard to find used and still $800+), so I went Dorman. But after recent research (this thread included) and videos from Rich Holdener on YT, the FAST 102 reigns supreme on comparison video it is used in.
For me to go FAST 102 would simply be a curiosity thing if it gains much more than my "ported" Dorman. And if it did at what additional cost.
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G Atsma (05-12-2020), smitty2919 (05-13-2020)
#745
TECH Senior Member
#746
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Plan is to get the car on the dyno for some pulls Saturday. Anxious to see what happens. This would be the first time getting true back to back results and to see what porting like this does, if anything.
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G Atsma (05-13-2020)
#748
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You and me both!
Here is my last visit. Halltech "Killer Bee" intake (where filter is behind front filler plate) and stock C5Z MAF vs stock LS3 intake and card MAF on SD tune +5hp/+5tq for a best of 385/338
Here is my last visit. Halltech "Killer Bee" intake (where filter is behind front filler plate) and stock C5Z MAF vs stock LS3 intake and card MAF on SD tune +5hp/+5tq for a best of 385/338
#749
TECH Apprentice
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anybody use this one from ebay https://www.ebay.com/itm/FOR-CHEVY-S...4234%7Ciid%3A1
#751
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Well, just wrapped up on the dyno.
Porting the Dorman LS2 was worth like I showed above was worth 11hp and 6ft lbs. I’m a happy camper
Final numbers 396/344 from 385/338.
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
When I get home I’ll post the dyno graph. It picked up all across the RPM band. Almost like a “phase shift” upwards of the plot. Confirmed gains reading A/F ratio leaning out at the top end. Ill post the A/F graph too.
Porting the Dorman LS2 was worth like I showed above was worth 11hp and 6ft lbs. I’m a happy camper
Final numbers 396/344 from 385/338.
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
When I get home I’ll post the dyno graph. It picked up all across the RPM band. Almost like a “phase shift” upwards of the plot. Confirmed gains reading A/F ratio leaning out at the top end. Ill post the A/F graph too.
Last edited by smitty2919; 05-17-2020 at 08:01 AM.
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wannafbody (05-19-2020)
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#757
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I think the DLS2 has some obvious improvements that can be made. I'd be curious if someone filled the port with JB weld vs doing what I did (grinding down the ceiling) to blend the runner to port. In doing so you would lose cross sectional area overall at the end of the runner, but would be an interesting comparison.
#758
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When i make it to the Corvette Forum its usually just to the C3 section. The responses to your thread over there just doubled
CF is sort of funny at times about actual tech. However, they do really seem to enjoy focusing on C7 vs C8 etc and how many Angels can fit on the head of pin etc.
Really, if I may suggest posting the information in the LS1tech dyno section and Dorman LS2 intake thread.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Really, if I may suggest posting the information in the LS1tech dyno section and Dorman LS2 intake thread.
#760
10 Second Club
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Well, just wrapped up on the dyno.
Porting the Dorman LS2 was worth like I showed above was worth 11hp and 6ft lbs. I’m a happy camper
Final numbers 396/344 from 385/338.
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
When I get home I’ll post the dyno graph. It picked up all across the RPM band. Almost like a “phase shift” upwards of the plot. Confirmed gains reading A/F ratio leaning out at the top end. Ill post the A/F graph too.
![](https://live.staticflickr.com/65535/49904310363_3c2b99dbae_c.jpg)
![](https://live.staticflickr.com/65535/49904312143_09c28d2e60_c.jpg)
Porting the Dorman LS2 was worth like I showed above was worth 11hp and 6ft lbs. I’m a happy camper
Final numbers 396/344 from 385/338.
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
When I get home I’ll post the dyno graph. It picked up all across the RPM band. Almost like a “phase shift” upwards of the plot. Confirmed gains reading A/F ratio leaning out at the top end. Ill post the A/F graph too.
![](https://live.staticflickr.com/65535/49904310363_3c2b99dbae_c.jpg)
![](https://live.staticflickr.com/65535/49904312143_09c28d2e60_c.jpg)
fantastic!
confirms my suspicions that the DLS2 is a hot rodders intake