turbo lag

Chevy1925

don't know sh!t about IFS
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Oct 21, 2009
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i think thats what they are all saying is 2k is that spot. i know my 475 in my twins wont start coming alive till then
 

Dirtymaxx03

Active member
Aug 4, 2009
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I guess what I'm looking for is more of 1700 rpms or so and roll into the throttle without downshifting. I wanna see that sweet spot, where it has just enough heat, fuel and rpm to start singing!

boosted launches and don't really show spool up to me.

It's really just curiousity, wanting to see how the consensus fairs across the board.

In the video I posted I rolled into the throttle around 1800rpms. Rolling start.
 

coker6303

Keep Calm and Chive On!!
Aug 6, 2009
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Why the curiousity in the 475?


Purely out of curiosity from the times I see people say they spool quick. I had read things like that in the past, and when I found the 366/480 setup I had a completely different idea of what spool up should have been vs actual.

I'm happy with my setup, just not what I expected from lurking on the forum. I did not post this thread because I'm unhappy.

A single would be much simpler under the hood, especially with a tall pedestal that you can get your hands in and around easily. Wouldn't be very hard to switch mine over either but I doubt I will ever do that.
 

Chevy1925

don't know sh!t about IFS
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Oct 21, 2009
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Purely out of curiosity from the times I see people say they spool quick. I had read things like that in the past, and when I found the 366/480 setup I had a completely different idea of what spool up should have been vs actual.

I'm happy with my setup, just not what I expected from lurking on the forum. I did not post this thread because I'm unhappy.

A single would be much simpler under the hood, especially with a tall pedestal that you can get your hands in and around easily. Wouldn't be very hard to switch mine over either but I doubt I will ever do that.

ah i see. yeah i know what you mean. seems everyone's interpretation of "no lag" is different and dependent on your driving behavior
 

brandon06dmax

the reckoning
Apr 29, 2013
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jactionville nc
coker i have to agree with u bro i rode in a 366/480 truck a 475 over stock truck and as you told me the 475 over stock truck was better for a daily driver but the 475 truck spooled about the same speed as the 366/480 imo but all 3 had different tuners and all sorts of other variables but there is no joy like the joy of a s472 or s475 lighting and all hell breaks loose
 

LWATSON

future trans limpers
Jul 30, 2008
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Scotland Neck NC
I guess what I'm looking for is more of 1700 rpms or so and roll into the throttle without downshifting. I wanna see that sweet spot, where it has just enough heat, fuel and rpm to start singing!

boosted launches and don't really show spool up to me.

It's really just curiousity, wanting to see how the consensus fairs across the board.
In my video on youtube its from a dead standstill with no boost. Just stabbed the throttle and went. You can see it lights around 1700-2000 rpms, but it still pulls hard before it lights. But when it lights it will bend the boost guage needle it hits so hard.
 

JoshH

Daggum farm truck
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Feb 14, 2007
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Not to speak for Russell, but since I talk to him on a regular basis about his truck, I feel I know where he is coming from. I don't think he has a problem at all with the way it spools from a stop or rolling around with the converter locked. I think his biggest gripe is when he is driving around at about 65-70 MPH with a locked converter in 6th with the engine lugging along at about 1600-1700 RPM. When he rolls into it, the turbos just don't respond like he's used to with a stock turbo. I think he's just wanting to see how a big single and other larger non stock turbo setups compare to his. Sorry if I'm out of line here, Russell.

I know on my old set of twins (366/4718), they really seemed to come alive around 1800 RPM, but I also had an aftermarket cam and a T3 gated 366 instead of a T4 non gated 366 like he has. Personally, I think he would be a little happier with the T3 housing.
 

coker6303

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Aug 6, 2009
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You are spot on josh, perfect summary. They run great and tow even better! It's just when you are under them it's crazy dead. When towing, the extra heat starts to bring them to life around 1800 and will pull a house down at 2200. Just a matter of staying on top of them.

Maybe I just need a small shot of "street" nitrous! Lol
 

blk smoke lb7

<-----Lots of green $
Nov 8, 2010
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belvidere,ill
Not to speak for Russell, but since I talk to him on a regular basis about his truck, I feel I know where he is coming from. I don't think he has a problem at all with the way it spools from a stop or rolling around with the converter locked. I think his biggest gripe is when he is driving around at about 65-70 MPH with a locked converter in 6th with the engine lugging along at about 1600-1700 RPM. When he rolls into it, the turbos just don't respond like he's used to with a stock turbo. I think he's just wanting to see how a big single and other larger non stock turbo setups compare to his. Sorry if I'm out of line here, Russell.

I know on my old set of twins (366/4718), they really seemed to come alive around 1800 RPM, but I also had an aftermarket cam and a T3 gated 366 instead of a T3 non gated 366 like he has. Personally, I think he would be a little happier with the T3 housing.
I totally agree Josh the t4 should spool a bit better thats what i have i still have a touch of lag but my truck has never been finsihed tuned it had a hot tune loaded into it the day at the track and it has never been looked at again so mine should get a little better.I can roll into it at 1500 1600 and it starts to get moving and i turn day into night.:D Gonna be a bit before i can get you a video Russ pulling my cab to do head gaskets now.:(Why dont you try a t3 with a gate?
 
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blk smoke lb7

<-----Lots of green $
Nov 8, 2010
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belvidere,ill
I also did the turbo blankets and i double wraped the hot exhaust pipe from the 366 to the 483 and the down pipe off the 483 heading out back.I wanted the heat to stay in the turbos as much as possible for them to spool quicker.
 

coker6303

Keep Calm and Chive On!!
Aug 6, 2009
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I need blankets for sure, never did get with the guy on here (Ely I think?). My exhaust pipes are rapped between the 66 and 80 and a little ways down the down pipe. When I do the block off plate for the wastegate I may take and double rap the pipe between the 66 and 80 to help hold more heat in.

Head gaskets already?? what happened?