Thread: Getting rid of KR?

well.. then explain why with a 3.8 and stock manis people see 7-8PSI and with a 3.5 and Headers they see 7-8psi... Sounds to me like you have improved flow....

Originally Posted by Iceman6669

well.. then explain why with a 3.8 and stock manis people see 7-8PSI and with a 3.5 and Headers they see 7-8psi... Sounds to me like you have improved flow....

Could be lots of reasons. Elevation, weather, belt slip, blower differences, engine differences, boost gauge inaccuracy...plus lots more.

Unless something is wrong, you shouldn't notice a pressure drop when switching to headers with a bolt-on car.

My 04 was hitting over 13psi on the stock pulley when I first got it running. I pulled out the stock DP and put in a 3" catless DP, and boost dropped to about 6 in the middle of winter. By your logic, that means a DP is the best mod you can do to these cars.

I know a few locals that did headers.. and WOULD HAVE noticed a PSI drop if they had not done a pulley drop also... I am just saying that while Bigger is not better, better routing is the key. And our headers do not have HUGE primaries. My thing has always been headers flow better then a PLOG and DP setup and cost about the same... Why not do headers...

Because stock manifolds are free.

Like I said, there are a lot more factors that contribute to manifold pressure than your exhaust pressure. As a matter of fact, exhaust pressure has very very little to do with intake manifold pressure.

Originally Posted by GTPpower

My 04 was hitting over 13psi on the stock pulley when I first got it running. I pulled out the stock DP and put in a 3" catless DP, and boost dropped to about 6 in the middle of winter. By your logic, that means a DP is the best mod you can do to these cars.

Well I will use your logic here then and say... What was the air temp and barometric pressure when you hit 13psi and when you hit 6? Were they at the same elevation? I am not trying to bust your balls here... I am simply saying that telling me that headers are no better then stock manifolds, I find it hard to believe...

Wow someone got butthurt... Suck to maintain... Hum.. Ok.. I guess.. IF you dont install them properly maybe...


And KIDS?? IDK about all that jazz...
Plus last I checked you drag race a turbocharged car anyway.. NOT a GP at that... Am I wrong.. Plus since when does the ability to drive in a straight line make you an expert on fluid dynamics?

Originally Posted by Iceman6669

Well I will use your logic here then and say... What was the air temp and barometric pressure when you hit 13psi and when you hit 6? Were they at the same elevation? I am not trying to bust your balls here... I am simply saying that telling me that headers are no better then stock manifolds, I find it hard to believe...

You are missing my point. I'm trying to show you how many variables there actually are that will affect intake manifold pressure.

[QUOTE=Iceman6669;1031867]Wow someone got butthurt... Suck to maintain... Hum.. Ok.. I guess.. IF you dont install them properly maybe...

QUOTE]

Excuse us if we don't take the word of someone that installed his first set of headers a couple months ago, vs a couple guys that have been installing and running all kinds of different headers for years.

I get your point... And trust me I fully understand it.. But even take my car for example. I recently went from stock manis and stock pulley to Speed Daddy headers and a 3.4. I mild weather (meaning 60-70* not super humid and at the same locations) I went from 8.5 PSI at the stock shift points to only about 9 psi at the stock shift point... So I have obviously improved flow. I am not saying that some cars can't do a 3.4 on a PLOG or even ported Manis. I am just saying that headers will flow better, and are better to have for longer term modding.

[QUOTE=GTPpower;1031881]

Originally Posted by Iceman6669

Wow someone got butthurt... Suck to maintain... Hum.. Ok.. I guess.. IF you dont install them properly maybe...

QUOTE]

Excuse us if we don't take the word of someone that installed his first set of headers a couple months ago, vs a couple guys that have been installing and running all kinds of different headers for years.

Point of fact it was a couple of weeks ago. And that is not the point.. I know LOTS of people with headers that have 0 issues with them. THAT was my point.

Originally Posted by Iceman6669

I get your point... And trust me I fully understand it.. But even take my car for example. I recently went from stock manis and stock pulley to Speed Daddy headers and a 3.4. I mild weather (meaning 60-70* not super humid and at the same locations) I went from 8.5 PSI at the stock shift points to only about 9 psi at the stock shift point... So I have obviously improved flow. I am not saying that some cars can't do a 3.4 on a PLOG or even ported Manis. I am just saying that headers will flow better, and are better to have for longer term modding.

You basically solidified my point even further.

I'll say it again. There are many factors that contribute to manifold pressure on these, or any car. Just because you notice the same boost with different levels of mods, means absolutly nothing.

how exactly did I prove your point?? I dropped .4" off my pulley yet my boost level BARELY changed...

Originally Posted by Iceman6669

Point of fact it was a couple of weeks ago. And that is not the point.. I know LOTS of people with headers that have 0 issues with them. THAT was my point.

I've been modding these cars for over 10 years. I don't think your experience is going to come anywhere close to mine on any aspect of these cars.

Prolly not... 10 years dont mean it is too late to learn to install headers so they dont leak....

Originally Posted by Iceman6669

how exactly did I prove your point?? I dropped .4" off my pulley yet my boost level BARELY changed...

Because you have absolutly no controls. Your method is complete assumption.

Originally Posted by Iceman6669

Prolly not... 10 years dont mean it is too late to learn to install headers so they dont leak....

You're doing a good job at backing my points up. Thanks!

LOL... ok guy. I didnt do it in a lab so it is worthless.... Let me say this.. MORE AIR IN.. SAME PRESSURE IN INTAKE MANIFOLD= MORE AIR GOING OUT... that is simple logic that even a 10 year vet can understand. I even told you that they were on the SAME car with similar environment conditions. I have even seen it on SEVERAL cars. Not just mine. But hey 10 years means that you just are not wrong. EVER.