Stock LS1 with Dorman 615-901 (90mm)?
02-14-2018, 06:37 PM
#1
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Stock LS1 with Dorman 615-901 (90mm)? I know similar topics have been discussed 1 million times but I have a 98 SS, stock internally, basically: Lid, Headers, Exhaust, Plugs/Wires (in terms of engine mods).
I plan to in the future to get heads/cam, street able but aggressive.
My question is, will my stock injectors (28-32lbs I think), be able to handle the Dorman 615-901 90mm intake, or should I just stick with the LS6 intake? I really don't want to upgrade the injectors just yet.
Thanks in advance!
I plan to in the future to get heads/cam, street able but aggressive.
My question is, will my stock injectors (28-32lbs I think), be able to handle the Dorman 615-901 90mm intake, or should I just stick with the LS6 intake? I really don't want to upgrade the injectors just yet.
Thanks in advance!
02-14-2018, 10:49 PM
#4
I just installed this intake along with heads and a cam, I will be doing a detailed build thread once I get it tuned. Bought 36lb Bosch injectors that should flow 42lbs at LS1 fuel pressure. Used the Holley sniper throttle body
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
02-14-2018, 11:20 PM
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I just installed this intake along with heads and a cam, I will be doing a detailed build thread once I get it tuned. Bought 36lb Bosch injectors that should flow 42lbs at LS1 fuel pressure. Used the Holley sniper throttle body
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
I did see a flow comparison where the Dorman out flowed the LS6 but not by a crazy amount, and I assume the Dorman was worked a little. I think the LS6 with a little work would match the Dorman in the low/mid range.
I'm still on the fence but unless a used fast pops up for a good price I don't think I'd consider getting one. My friend has the Fast 78, I might consider that if he would sell it lol.
02-14-2018, 11:21 PM
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Looks like most of the info I need is right here:
https://ls1tech.com/forums/generatio...s2-intake.html
If you have suggestions or reasons why I should go LS6, chime in, maybe you can change my mind but I've heard the Dorman is the best bang for buck.
https://ls1tech.com/forums/generatio...s2-intake.html
If you have suggestions or reasons why I should go LS6, chime in, maybe you can change my mind but I've heard the Dorman is the best bang for buck.
Last edited by Mike96z; 02-14-2018 at 11:33 PM.
02-15-2018, 06:23 AM
#7
I don't mind doing the work on it, the only thing I need to figure out is what people are doing for the intake bellow from throttle body to MAF to lid, I know it will sit lower and it causes some complications. I think the gains are worth the trouble.
I did see a flow comparison where the Dorman out flowed the LS6 but not by a crazy amount, and I assume the Dorman was worked a little. I think the LS6 with a little work would match the Dorman in the low/mid range.
I'm still on the fence but unless a used fast pops up for a good price I don't think I'd consider getting one. My friend has the Fast 78, I might consider that if he would sell it lol.
I did see a flow comparison where the Dorman out flowed the LS6 but not by a crazy amount, and I assume the Dorman was worked a little. I think the LS6 with a little work would match the Dorman in the low/mid range.
I'm still on the fence but unless a used fast pops up for a good price I don't think I'd consider getting one. My friend has the Fast 78, I might consider that if he would sell it lol.
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02-15-2018, 06:37 AM
#8
I just installed this intake along with heads and a cam, I will be doing a detailed build thread once I get it tuned. Bought 36lb Bosch injectors that should flow 42lbs at LS1 fuel pressure. Used the Holley sniper throttle body
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
I would stick with the ls6 intake until you get the heads and cam.
With the dorman unit you will need to do some pretty basic stuff to make it work, not it's easy if your good mechanically. You will have to add a nipple for the vacuum systems, grind the water pump some and the throttle body. The intake runners also need to be smoothed.
02-15-2018, 07:15 AM
#9
Honestly I haven't even fired up the car yet. I should get it going up pretty soon (like within the next two weeks). I want to get a pre-tune done before I attempt to fire it up since I've changed so much. Just have to work with my tuner on a time. It was pretty easy to get the injector data from Fuel Injector Connection even though I bought them from Texas Speed.
02-15-2018, 10:07 AM
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Yea I seen them listed there, I wasn't sure if I could find them elsewhere lol. I found someone selling "Fuel Injector Clinic" 56lb injectors for the same price locally.
02-15-2018, 10:37 AM
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Yea I'm sure they would be. I probably won't get injectors now. I'm kind of leaning towards the LS6 intake now. I don't mind doing the work for the Dorman but I couldn't find enough proof that it would outperform it by that much other than in the higher end. I'm sure the more power you get the difference would become more noticeable.
02-15-2018, 11:06 AM
#15
Yea I'm sure they would be. I probably won't get injectors now. I'm kind of leaning towards the LS6 intake now. I don't mind doing the work for the Dorman but I couldn't find enough proof that it would outperform it by that much other than in the higher end. I'm sure the more power you get the difference would become more noticeable.
02-15-2018, 11:12 AM
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If you get numbers of your ls6 vs dorman please share!
02-15-2018, 12:09 PM
#17
Yea I know the gains will be slight but it's a gain for sure, especially after I tune it somewhat. I know the LS6 intakes are hard to find but easy to sell. I might pick one up and if I decide to change down the line I'll surely do that.
If you get numbers of your ls6 vs dorman please share!
If you get numbers of your ls6 vs dorman please share!
02-15-2018, 12:18 PM
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The problem I'll have is I did everything at the same time. I am going directly from an OEM engine w/LS6 intake to a full bolt on H/C/I with all new components so I won't have an exact LS6 vs. DLS2 comparison. The car has been down since November as I do everything at the same time.
02-15-2018, 09:02 PM
#19
mike, keep in mind that generally speaking, the larger you go injector wise, the tougher it is for the tuner to get it fine tuned, like idling and such. thats why i can't understand why these guys are putting 60+ pounders on HCI cars. they flow so much that i think its tough for the injectors to only put a small amount of fuel like when ur idling. i think the 36s that flow 42ish at 58 psi run roughly 80% duty around 450 rwhp or so.
02-15-2018, 11:41 PM
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mike, keep in mind that generally speaking, the larger you go injector wise, the tougher it is for the tuner to get it fine tuned, like idling and such. thats why i can't understand why these guys are putting 60+ pounders on HCI cars. they flow so much that i think its tough for the injectors to only put a small amount of fuel like when ur idling. i think the 36s that flow 42ish at 58 psi run roughly 80% duty around 450 rwhp or so.