Ported LSA gains
Thread Starter
Joined: Nov 2008
Posts: 2,423
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From: A-Town, Ill side
Ported LSA gains I thought I would throw this post up for anyone, wondering the gains you might expect from getting a LSA blower ported.
This particular car, already had a hand ported snout and a 102mm Holley TB on it. Prior to the blower porting, the car made 18# of boost, on a LC9 5.3.
After the port (done by Jokers) the car made 20# of boost, on the exact same tuneup, with absolutely nothing changed. The DA was actually a little higher than normal if you want to dig that deep (old DA 1983 vs 2117).
The car picked up .220 with the exact same tuneup off the rip, and it backed that number up 2x before I touched anything.
Since it was making more power, it was upsetting the chassis on the 2-3 shift and knocking off the tire some, I pulled some timing out of it in that area, and the car just with that change, then went .346 faster than previous, setting it's personal best by a considerable amount, and doing that on a no prep surface. Really looking forward to LS Fest this year, as that is the only time that car, plays on glue.
This particular car, already had a hand ported snout and a 102mm Holley TB on it. Prior to the blower porting, the car made 18# of boost, on a LC9 5.3.
After the port (done by Jokers) the car made 20# of boost, on the exact same tuneup, with absolutely nothing changed. The DA was actually a little higher than normal if you want to dig that deep (old DA 1983 vs 2117).
The car picked up .220 with the exact same tuneup off the rip, and it backed that number up 2x before I touched anything.
Since it was making more power, it was upsetting the chassis on the 2-3 shift and knocking off the tire some, I pulled some timing out of it in that area, and the car just with that change, then went .346 faster than previous, setting it's personal best by a considerable amount, and doing that on a no prep surface. Really looking forward to LS Fest this year, as that is the only time that car, plays on glue.
If I had money burning a hole in a pocket I tell you what!
So many possibilities these days in the LSA world. Including bigger blower in LSA shaped blower cases.
For me the biggest hang up in going after anymore easy power is all the other associated stuff to go along with it. Intake/filter restriction, needs 3 inch exhaust, and taking advantage of any port work really requires a 102ish MM DBW throttle body in my case. I hear nothing but bad as far as tuning and drivability on C5s with those big TBs.
and then we have the transmission/diff made of glass at this power level lol.
I need to win the lottery.
In all seriousness I have seen many examples of just porting the snout and blower case picking up big power!
So many possibilities these days in the LSA world. Including bigger blower in LSA shaped blower cases.
For me the biggest hang up in going after anymore easy power is all the other associated stuff to go along with it. Intake/filter restriction, needs 3 inch exhaust, and taking advantage of any port work really requires a 102ish MM DBW throttle body in my case. I hear nothing but bad as far as tuning and drivability on C5s with those big TBs.
and then we have the transmission/diff made of glass at this power level lol.
I need to win the lottery.
In all seriousness I have seen many examples of just porting the snout and blower case picking up big power!
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Joined: Nov 2005
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If I had money burning a hole in a pocket I tell you what!
So many possibilities these days in the LSA world. Including bigger blower in LSA shaped blower cases.
For me the biggest hang up in going after anymore easy power is all the other associated stuff to go along with it. Intake/filter restriction, needs 3 inch exhaust, and taking advantage of any port work really requires a 102ish MM DBW throttle body in my case. I hear nothing but bad as far as tuning and drivability on C5s with those big TBs.
and then we have the transmission/diff made of glass at this power level lol.
I need to win the lottery.
In all seriousness I have seen many examples of just porting the snout and blower case picking up big power!
So many possibilities these days in the LSA world. Including bigger blower in LSA shaped blower cases.
For me the biggest hang up in going after anymore easy power is all the other associated stuff to go along with it. Intake/filter restriction, needs 3 inch exhaust, and taking advantage of any port work really requires a 102ish MM DBW throttle body in my case. I hear nothing but bad as far as tuning and drivability on C5s with those big TBs.
and then we have the transmission/diff made of glass at this power level lol.
I need to win the lottery.
In all seriousness I have seen many examples of just porting the snout and blower case picking up big power!
My biggest thing with my LSA setup is I'm on a 90mm tb and doing a 102mm would be the next step, but I'm in the same boat of wanting driveability over absolute speed. If I made the car run like crap right now, wife would probably stab me when she took the kids to school in the car. Not running any sort of slick on top of that the difference between the 700whp the car makes right now to anything more is just going to be the amount of tire smoke.
Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 223
From: A-Town, Ill side
I hand ported the snout on this car a couple years ago, but put the 102 on it just before LS Fest last September.
I don't understand drivability issues from a 102, but maybe that is because those are DBW, not DBC like we have on this car.
These will support in the low 20# area ported, but you have to have enough intercooling to support it because they can make some heat.
I think the owner, wants to spray it a little next. I think we are going to work on 100hp shot to help you know, cool it down 🤣
Over the winter, we are going to build a new engine. I think we are going to shoot for 400 ci and swap it over to Rec port heads. It should start moving then.
I don't understand drivability issues from a 102, but maybe that is because those are DBW, not DBC like we have on this car.
These will support in the low 20# area ported, but you have to have enough intercooling to support it because they can make some heat.
I think the owner, wants to spray it a little next. I think we are going to work on 100hp shot to help you know, cool it down 🤣
Over the winter, we are going to build a new engine. I think we are going to shoot for 400 ci and swap it over to Rec port heads. It should start moving then.
Last edited by rpturbo; May 10, 2025 at 07:48 PM.
Why not just build a turbo setup and go really fast?
That being said Jake Hartline's CTSv (3050lbs) is running 7.50's@175mph with a ported LSA blower and Kong billet snout which is pretty insane. I'm guessing its a very large cubic inch engine.
https://www.ctsvowners.com/threads/k....162364/page-3
That being said Jake Hartline's CTSv (3050lbs) is running 7.50's@175mph with a ported LSA blower and Kong billet snout which is pretty insane. I'm guessing its a very large cubic inch engine.
https://www.ctsvowners.com/threads/k....162364/page-3
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Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 223
From: A-Town, Ill side
Why not just build a turbo setup and go really fast?
That being said Jake Hartline's CTSv (3050lbs) is running 7.50's@175mph with a ported LSA blower and Kong billet snout which is pretty insane. I'm guessing its a very large cubic inch engine.
https://www.ctsvowners.com/threads/k....162364/page-3
That being said Jake Hartline's CTSv (3050lbs) is running 7.50's@175mph with a ported LSA blower and Kong billet snout which is pretty insane. I'm guessing its a very large cubic inch engine.
https://www.ctsvowners.com/threads/k....162364/page-3
With that said, I'm just finishing my twin turbo project in his shop, and now he sees how to do it.
I believe his next long term project is going to be a twin turbo Karman Ghia. Not sure if it will be a traditional BBC or LS powered.
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Owner of the car started out N/A, and then eventually changed to the LSA when they were cheap-ish. This particular car, doesn't really have room for turbos.
With that said, I'm just finishing my twin turbo project in his shop, and now he sees how to do it.
I believe his next long term project is going to be a twin turbo Karman Ghia. Not sure if it will be a traditional BBC or LS powered.
With that said, I'm just finishing my twin turbo project in his shop, and now he sees how to do it.
I believe his next long term project is going to be a twin turbo Karman Ghia. Not sure if it will be a traditional BBC or LS powered.
Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 223
From: A-Town, Ill side
Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 223
From: A-Town, Ill side
It has a custom built 5" steel tube.
Funny you mention the air filter, I call that the boost controller. 🤣. We can only fit a little air filter on it, it used to knock 3# out of it, but it hasn't been tried since the porting.
At the track, we always run it without a tube or anything. I've thought about putting a velocity stack on the T.B. but haven't tried it yet.
Funny you mention the air filter, I call that the boost controller. 🤣. We can only fit a little air filter on it, it used to knock 3# out of it, but it hasn't been tried since the porting.
At the track, we always run it without a tube or anything. I've thought about putting a velocity stack on the T.B. but haven't tried it yet.
It has a custom built 5" steel tube.
Funny you mention the air filter, I call that the boost controller. 🤣. We can only fit a little air filter on it, it used to knock 3# out of it, but it hasn't been tried since the porting.
At the track, we always run it without a tube or anything. I've thought about putting a velocity stack on the T.B. but haven't tried it yet.
Funny you mention the air filter, I call that the boost controller. 🤣. We can only fit a little air filter on it, it used to knock 3# out of it, but it hasn't been tried since the porting.
At the track, we always run it without a tube or anything. I've thought about putting a velocity stack on the T.B. but haven't tried it yet.
due to packaging it is going to be a challenge to put something on my car that works and since it is a street car has a giant filter on it.
Depending on how you interpret the numbers we picked up right around 50rwhp by taking the intake/filter contraption off the car and going to a 4 inch dia silicone coupler with an amazon bellmouth on it lol. That is pretty incredible.
