Texas speed headers

CptMcSaug · December 22, 2015

I know on the ls1 engines people would get 10 - 15hp more with the larger diameter

jrob56 · December 22, 2015

I know on the ls1 engines people would get 10 - 15hp more with the larger diameter

On a stock engine this is BS and Ill eat my hat if you can prove it. For FI or radical N/A setup maybe.

Had both on 2 different bolt on 4th gen Z28s, the 1/7/8 were just a bitch to install. No other discernible difference.

CptMcSaug · December 22, 2015

On a stock engine this is BS and Ill eat my hat if you can prove it. For FI or radical N/A setup maybe.

Had both on 2 different bolt on 4th gen Z28s, the 1/7/8 were just a bitch to install. No other discernible difference.

This guys was intake only and made just a few more HP, intake with no tune (maybe a tune? can't tell)

http://ls1tech.com/forums/generation-iii-external-engine/981229-stock-motor-1-3-4-vs-1-7-8-engine-dyno-results.html

This mag did a good job and showed similar results, also I doubt they retuned everytime.

http://www.hotrod.com/how-to/engine/ls1-engine-header-test/

With tunes I bet the gains would be great and the potential is always there, I wish I could find something with the DI engines but I couldn't. I would rather buy once than twice.

Are those Hat eating results?? Meh, that's for you to decide.

jrob56 · December 22, 2015

This guys was intake only and made just a few more HP, intake with no tune (maybe a tune? can't tell)

http://ls1tech.com/forums/generation-iii-external-engine/981229-stock-motor-1-3-4-vs-1-7-8-engine-dyno-results.html

This mag did a good job and showed similar results, also I doubt they retuned everytime.

http://www.hotrod.com/how-to/engine/ls1-engine-header-test/

With tunes I bet the gains would be great and the potential is always there, I wish I could find something with the DI engines but I couldn't. I would rather buy once than twice.

Are those Hat eating results?? Meh, that's for you to decide.

First both these examples are on an engine dyno and dont live up to your claim. Saying that "people would get 10-15hp more with larger diameter" is setting the expectation that this was in a car too, very misleading.

First showed 6hp/2lbft increase going from 1 3/4 to 17/8, on engine dyno. So gains in a car marginal.

Second is even worse, marginal gain in average for hp and torgue less than 1. Peak torque stayed the same peak horsepower saw 6hp improvement. Again on an engine dyno.

The old notion that bigger is worse was dispelled on LS engines long ago, but lets not swing the other way and now say 1 7/8 shows a big gain on a stock engine. 1 7/8 usually cost more and take up more room in an area of most vehicles were clearance is tight. Best way to choose is long term goals, price, and clearance. No real gain to be had on a stock to bolt on vehicle.

Willshire · December 22, 2015

Not sure how much longer their stainless long tube are over their truck system but, i do not see any significant tube length difference for creating additional horsepower. Do these come with pre and post o2 sensor bungs? Like jrob said, clearance is a big factor. Although the price point of the long tubes says a lot too. Their truck headers, if the pic is a good representation, look to be quite long as it is. I know on my 00 sierra they were not much longer to the y pipe than the stock manifolds

CptMcSaug · December 22, 2015

First both these examples are on an engine dyno and dont live up to your claim. Saying that "people would get 10-15hp more with larger diameter" is setting the expectation that this was in a car too, very misleading.

First showed 6hp/2lbft increase going from 1 3/4 to 17/8, on engine dyno. So gains in a car marginal.

Second is even worse, marginal gain in average for hp and torgue less than 1. Peak torque stayed the same peak horsepower saw 6hp improvement. Again on an engine dyno.

The old notion that bigger is worse was dispelled on LS engines long ago, but lets not swing the other way and now say 1 7/8 shows a big gain on a stock engine. 1 7/8 usually cost more and take up more room in an area of most vehicles were clearance is tight. Best way to choose is long term goals, price, and clearance. No real gain to be had on a stock to bolt on vehicle.

By no means do I think 10-15hp is a large gain. Do 1 7/8s make more power? Yes, a lot? No. But its been shown on the new DI engines that they take mods really well, better than the LS series. As for price its hard to find a company that makes both 1 3/4 and 1 7/8. Kooks does the price is 20 bucks from them difference.

I'm not meaning to say that 1 7/8s is gonna make you feel like a rocket compared to 1 3/4 but the difference is there.

Also companys like TS might be a reason they only show 1 7/8s?

jrob56 · December 22, 2015

By no means do I think 10-15hp is a large gain. Do 1 7/8s make more power? Yes, a lot? No. But its been shown on the new DI engines that they take mods really well, better than the LS series. As for price its hard to find a company that makes both 1 3/4 and 1 7/8. Kooks does the price is 20 bucks from them difference.

I'm not meaning to say that 1 7/8s is gonna make you feel like a rocket compared to 1 3/4 but the difference is there.

Also companys like TS might be a reason they only show 1 7/8s?

Ehh facts are in the thread now, at the wheels your 6hp difference is even smaller and nothin you would ever notice. Would be in the margin of error on a dyno. I havent got a good look at headers on these trucks, but for that tiny gain Id take the extra clearance of 1 3/4. Unless truck is getting a blower or pretty beefy internal build.

You should think 10-15hp is a very healthy gain, most bolt on mods dont get much more than that. You make that sound like small potatoes, but look at link you posted. That was more than the vette manifolds to TTS 1 7/8 headers.... Those headers look like poo, very short collector but is what it is.

07Softail · December 22, 2015

If you can get 1 3/4" get them. There is a reason premium header manufactures make 1 3/4" primaries and it's not because of a price difference. Let's face it... some people out there that just wanna say they have 1 7/8" primaries not knowing what the hell they are doing away! The key word with header primary size is (OPTIMAL) not bigger is better.

RT

Txjose · December 23, 2015

So you think I would still net similar results with the 1 7/8 over 1 3/4? The most performance this truck will ever have is headers, exhaust, intake, and tune.

From most of the tuners that i have talked with that seems to be the general opinion. 1 7/8 will net u the same low /mid but a bit more top end.

Willshire · December 29, 2015

What size are the exhaust ports on the 5.3 and 6.2L heads? If you place a 1-3/4" primary gasket on the head is there still aluminum showing from the exhaust port or is the gasket smaller than the port? If it is the former, then i would port match the 1-3/4" a well port matched 1-3/4" will be superior to a "slap on and go" 1-7/8". If you decide that milling off another 1/16" all the way around the port for 1-7/8" primaries is in the budget, have atter.

07Softail · December 30, 2015

Texas Speed headers= Ching Chang headers!

RT

Txjose · December 31, 2015

Texas Speed headers= Ching Chang headers!

RT

If they are made in Texas they are made of Copenhagen and miller light infused with deer blood coated in tears of EPA representatives.

07Softail · December 31, 2015

HaHaaa!

RT

Willshire · January 4, 2016

Comparing a long tube header to the vette manifold, which btw looks like a cast iron header, is not an easy comparison to a log manifold. Essentially all they did in that test was change primary sizes and length as the vette manifolds were separated down to a collector (aka a header) i think you would see a larger increase of a long tube over a log. or a vette manifold over a log. IMO

Tong Lu · January 18, 2016

If you guys watch any of the MotorTrend videos on Youtube, they recently just did a test on headers and it turns out the size of the tube does absolutely nothing to the HP. Here's a link https://www.youtube.com/watch?v=azPKIjxmmdU.

With that being said, what's the difference between Texas Speed and Pacesetters? Pacesetters are 240ish on Amazon for the "painted" ones and Texas Speed is almost 500.