6.0 Compression and pump gas
Thread Starter
Staging Lane
Joined: Jun 2011
Posts: 52
Likes: 0
6.0 Compression and pump gas Hello
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
Thread Starter
Staging Lane
Joined: Jun 2011
Posts: 52
Likes: 0
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OP, to answer the final question of your post, detonation is when the fuel mixture starts to burn before the spark plug fires. The heat of compressing the mixture can be enough to cause it.
On a LS motor, if you are around 11:1 compression, you should be fine. Just run premium gas. Lots of us run 11.5:1, and that just requires knowing your cam specs very well
On a LS motor, if you are around 11:1 compression, you should be fine. Just run premium gas. Lots of us run 11.5:1, and that just requires knowing your cam specs very well
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Hello
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
Yup and that "truck" cam is better than the mild sbc cams people would go with not too long ago. I ran 12.20 in the 1/4 with just a mailorder tuned lq4 , all stock including that truck cam you(OP) speak of.
Hello
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
I have a lead on a set of 799 heads. My concern is with my set up can I still run on pump gas. The engine will go into my 95 firebird convertible which is currently a 3.4 5 speed dog. This will be a fair weather driver. No track time. I am looking for a fun car I can be proud of. I drive a minivan most days. Here is what the engine would look like with the 799's.
Lq4 block
Lq9 Pistons
Ls6 Intake, with ported TB
I will need a different cam because the lq4 cam is for a truck. Here are the specs of the cam I was looking at.
Tick Performance ls2 street heat stage 1 229/232 | .619”/.600” | LSA113+3
From what I understand the specs of this build would be essently the same as the ls2
From what I read the compression would be close to 11.1. If I use the 799 heads instead of the 317 would my compression be too high for pump gas.
Also, I read that high compression might lead to "detonation". What does that mean?
Thread Starter
Staging Lane
Joined: Jun 2011
Posts: 52
Likes: 0
So you ran the stock truck cam in your car? How did it feel down low? Was it zippy off the line with all that tourque? thanks
Disregard my mph in my sig as it's misleading due to a headwind, it should have been about 111-112 but that's how weather goes on track days.
Last edited by foxsl; Dec 9, 2015 at 04:29 AM.
With me the weight is 3229 lbs. My friend's setup is nearly identical except his weighs 200 lbs more. Same stock 2005 lq4 but with a much more expensive torque converter (3500 stall) and holley LS tuned, he ran 12.18 in the 1/4 mile. Same rear gears but 4l80 trans.
Last edited by foxsl; Dec 9, 2015 at 04:32 AM.
226/232 .612/.595 112+2
This camshaft would be ground with my IP/XP lobe combination on either a Cam Motion 5150 or 8620 cam core. I do recommend the 8620 cam core as well.
This cam would be very fun to drive and would have a powerband of roughly 2200-6600 RPM. Good power at low engine speeds, strong mid-range and enough top end pull for those long stretches of open highway we often encounter out in "Mexico" ....
