Can the factory TPI intake be reduced in height by shortening the runners?
#241
I wish I had gotten in on this on page one, but maybe it's better that I didn't.
Phoenix, I don't know how old you are or how much experience you have with engines, but since you don't want to listen to others who have btdt, please continue with this project and post back your build and results.
Phoenix, I don't know how old you are or how much experience you have with engines, but since you don't want to listen to others who have btdt, please continue with this project and post back your build and results.
- This is a daily driven car that will see winter and deep snow driving. My build goals, daily drive-ability, snow drive-ability, must be carefully balanced.
- I wish to maintain my fuel mileage average 15 mpg city and 18 mpg mixed with mostly highway driving. I am being frugal about economy for good reasons.
- I do not wish to lower my rear gear ratio to 3.75 or even 4.11. City driving, daily driving, do not make it safe for a car that accelerates quickly, my stock ratio is better suited for my mileage and acceleration concerns. Furthermore, driving around town in higher than necessary RPM range to make use of my LT1 intake is counter to my fuel efficiency mandate.
- If anything, my goal will be to increase airflow in the motor and focus on as much power production on the low end to mid-range than at high RPM. This is why my logic has me craving the TPI intake with long runners and why I am ruling out the stroker option, for now.
Last edited by Phoenix'97; 11-01-2017 at 02:37 PM.
#242
Please answer why you would build a "daily driver" out of a 6 speed 'sports car' for driving in the snow / seasons, set limits on what mods you will do to make the car operate better, plan on running out of the ordinary fuels in it, try to make it get better fuel mileage.
You are the one doing everything *** backwards here.
If you can't afford a truck or real daily driver you should not have a fun car and try to make it work. It's dangerous to you , and others. The other BS is just that, OR move!
You are the one doing everything *** backwards here.
If you can't afford a truck or real daily driver you should not have a fun car and try to make it work. It's dangerous to you , and others. The other BS is just that, OR move!
A little bit of torque may not be much for you, but for me, I will definitely notice it and I only need a little bit more to keep her coasting on the expressway without the need to constantly downshift for minor inclines. Even driving on the uneven roads, that little bit of torque will be of much use, not to race, but just to get going and stay going without the need for higher RPMs to make use of that racing intake I have equipped, stock from GM!
#243
Team Owner
Pro Mechanic
I only need a little bit more to keep her coasting on the expressway without the need to constantly downshift for minor inclines. Even driving on the uneven roads, that little bit of torque will be of much use, not to race, but just to get going and stay going without the need for higher RPMs to make use of that racing intake I have equipped, stock from GM!
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Last edited by Tom400CFI; 11-01-2017 at 03:24 PM.
#244
#245
Team Owner
Pro Mechanic
Hey, Any time! You've already gotten way more of it than you probably deserve (or will ever put to use), but just for good measure, don't for get to get a MAF and TPS enhancer, too! This turned out to be way easier than anyone believed possible.
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Last edited by Tom400CFI; 11-01-2017 at 04:01 PM.
#246
#247
Race Director
GREGGPENN has clearly mentioned what his early build goals were which are not too far away from my own using the philosophy of low end to mid-range torque. However, a TPI motor is not an LT1 and vice-versa, but the intakes from these two motors should be able to be swapped, and while many have put LT1 intakes on the L98, how many of have put a TPI intake on a second-generation LT1? I post my threads and I get hell for my build goals... What can I say? I am a lame duck.
The issue(s) between HP, TQ, and gearing aren't easily predictable. For example, swapping to a lower gear won't necessarily improve your 1/4m time. When I was your age, I swapped wheels/tires on my 77 Honda CVCC under the ASSUMPTION lower rpms would translate to better MPG. IT DID NOT. The conversion was from 13" to 14" wheels...with bigger tires too. The overall diameter increased a good bit. Plus, that car was a 4-spd stick so I also had good control over RPMs.
No matter what I tried, MPG wasn't as good as the stock Honda config. I was forced to conclude the extra weight was a bigger negative than the slower engine rpms. At the time, I was still a student, made paltry wages, gas prices boomed, and it was a "bounce-back" car from my 1975 TransAm (455) that I owned for a short-time in the 80's. That TA SUCKED gased so fast, I could SEE the gas gauge drop. Besides the BASED door, I'm sure I snagged it because of the gas crisis back then. Anyway...I followed it up with attempts at fuel-sipping.
They had gadgets that would line up ions or inject H2O into your fuel. It was all a crock. And, YEARS later, I see you making uneducated and schizophrenic statements like below...
[*]I do not wish to lower my rear gear ratio to 3.75 or even 4.11. City driving, daily driving, do not make it safe for a car that accelerates quickly, my stock ratio is better suited for my mileage and acceleration concerns. Furthermore, driving around town in higher than necessary RPM range to make use of my LT1 intake is counter to my fuel efficiency mandate.
THAT ALONE shows one of two things: Either your nuts OR you want more power than you openly admit. There is NO OTHER CHOICE!!! A swap to a TPI won't bump PERCEIVABLE power levels except in the 2500-4000 rpm range. You've NEVER said you WANT power up there.
In fact, you made the dumb (IMO) statement about WANTING a TPI because it CHOKES air starting at 3k rpms. That sir, is a lame duck statement! So were some comments about deceleration and emissions WHILE LEADING US ON FOR DAYS about your inability to modify the hood to get a TPI to fit.
So...Since we are "closing this topic", let's conclude: You don't really need ANY extra power for your goals, you are unable to see how gears would give you MORE -- if you weren't so stubborn, you need more education on tuning considerations, and you make too many assumptions about your ability to SAVE fuel by altering what the factory (much more) carefully put together.
When I set out for MY build, I openly wanted maximum power from idle to 4500-5000rpms. I wanted a build that would eliminate the need for double-gear downshifting. I wanted a build that would look fairly stock but surprise anyone that saw/drove it via pulling power. In comparing/overlaying dynos from MANY builds, I realized focus on a torque build would create the big block driving experience in a small block car. When younger, I owned that 455 TA in addition to a '68 GTO. Once I hit my 30's, I didn't own anything that powerful until I built my Corvette in my 50's.
While MPG was a consideration, made LOTS of decisions that abandoned fuel for power. But, that's because I already had the knowledge of what a 400 or 455 does when your right foot get's "excited". No matter what/how you "build" a motor for torque or horsepower, stomping it will suck more fuel. In fact -- compared to light-foot hyper-mile driving -- you'll use fuel at least 4 times faster. WOT driving isn't saving.
If you JUST want the slightest press of the foot pedal to be more responsive, gears will accomplish that better. Why? Because, to get more power from that TPI "bump", you'd need to downshift FIRST and/or keep rpms near that 2500 - 3000 rpm range. But, a slight tap even off-idle, will PULL more readily.
You NEED to prioritize whether POWER or MPG is your priority. You need to resolve simple and obvious statements like: Your car already accelerates "quickly" AND....that it sounds UNSAFE for the situation already at hand.
Longtube, mid-length tube, and short-tube runners give you the option of focusing power in the 3-4k range, 4-5k range, or higher. To focus on lower rpms, you need gears, a cam, or more cubes. And, it sounds pretty darn contradictory for someone worried about ALREADY having a car "unsafe" for anything but calm driving in the city...or someone worried about economy/emissions.
I thought that simple change of tire diameter would help me back in the 80's. It didn't. What you are considering isn't so simple, cheap, or particularly suited to the goals YOU conveyed to this forum.
YOU are the one who turned this into a lame duck conversation though odd, contradictory statements -- some not even based in fact. Until you understand THOSE things, you won't understand the tone of our replies.
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Tom400CFI (11-01-2017)
#248
Burning Brakes
Member Since: Oct 2017
Location: Somewhere near Fort Wayne, Indiana
Posts: 788
Received 103 Likes
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It is not that I don't want to listen, it is just that certain advice is outside of the parameters I have set for this future build. I will repeat them.
- This is a daily driven car that will see winter and deep snow driving. My build goals, daily drive-ability, snow drive-ability, must be carefully balanced.
- I wish to maintain my fuel mileage average 15 mpg city and 18 mpg mixed with mostly highway driving. I am being frugal about economy for good reasons.
- I do not wish to lower my rear gear ratio to 3.75 or even 4.11. City driving, daily driving, do not make it safe for a car that accelerates quickly, my stock ratio is better suited for my mileage and acceleration concerns. Furthermore, driving around town in higher than necessary RPM range to make use of my LT1 intake is counter to my fuel efficiency mandate.
- If anything, my goal will be to increase airflow in the motor and focus on as much power production on the low end to mid-range than at high RPM. This is why my logic has me craving the TPI intake with long runners and why I am ruling out the stroker option, for now.
One question, why are you concerned about vacuum?
#249
Team Owner
Pro Mechanic
Maye the OP can "get it", this time.
#250
Team Owner
#251
Drifting
Im pretty sure you all have been trolled hard here.. a google search provides that the moniker "Phoenix97" has been used and BANNED on various other message boards, such as:
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
The following users liked this post:
Tom400CFI (11-01-2017)
#252
Race Director
Im pretty sure you all have been trolled hard here.. a google search provides that the moniker "Phoenix97" has been used and BANNED on various other message boards, such as:
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
#253
Team Owner
Pro Mechanic
What!? A troll?? I had no idea!
#254
Im pretty sure you all have been trolled hard here.. a google search provides that the moniker "Phoenix97" has been used and BANNED on various other message boards, such as:
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
http://www.religionforums.org/User-Phoenix97
http://www.top-law-schools.com/forum...?f=18&t=254968
https://phoenix97.deviantart.com/
I had no idea. I still don't believe it.
"I really have faith in this guy to make this work" It is a very outside the box and creative idea.
Oh wait... "10 year lt1 car owner", LS forums admitted in 1st post, Knows just enough to keep people going, repeats almost the same 4 details every reply or so, etc...
Back on topic
Penix Many guys with the 6 speed find it unusable until they switch rear gears, maybe your cam grinder and tuner can tune it to 1700 rpm most torque.
#255
Team Owner
Pro Mechanic
Why F-around with the putt-putt, "short runner" TPI, when you can have a proper long runner intake?? Stop messing around and get 30" of ram tuned INTAKE! Tuned to peak at 2800....it'll turn ANY LT1 into the ULTIMATE
TOWAK MONSTAH!!!
TOWAK MONSTAH!!!
#256
Race Director
Weld some injector bungs into that PLUS custom fab some bolt-on, ram-air plenums and connect them to the inlets of his 97 TA and he's hit nirvana!
#257
Team Owner
I had no idea. I still don't believe it.
"I really have faith in this guy to make this work" It is a very outside the box and creative idea.
Oh wait... "10 year lt1 car owner", LS forums admitted in 1st post, Knows just enough to keep people going, repeats almost the same 4 details every reply or so, etc...
Back on topic
Penix Many guys with the 6 speed find it unusable until they switch rear gears, maybe your cam grinder and tuner can tune it to 1700 rpm most torque.
"I really have faith in this guy to make this work" It is a very outside the box and creative idea.
Oh wait... "10 year lt1 car owner", LS forums admitted in 1st post, Knows just enough to keep people going, repeats almost the same 4 details every reply or so, etc...
Back on topic
Penix Many guys with the 6 speed find it unusable until they switch rear gears, maybe your cam grinder and tuner can tune it to 1700 rpm most torque.
#258
Team Owner
Why F-around with the putt-putt, "short runner" TPI, when you can have a proper long runner intake?? Stop messing around and get 30" of ram tuned INTAKE! Tuned to peak at 2800....it'll turn ANY LT1 into the ULTIMATE
TOWAK MONSTAH!!!
TOWAK MONSTAH!!!
#260
Race Director
GREGGPENN, thank you for letting me know that SLP runners are a tad shorter in length than stock TPI runners and in turn their different flow rate and harmonics may not suit what I am trying to build for my car. This is where the more expensive TPIS runners with a stock manifold base, may suit the intake better, if I shall go this route.
Brother!
WHAT I SAID was their internal structure is harder to port around due to the mounting bosses. WHAT THAT MEANS is there are obstructions inside tubes that "pinch" air flow. TPIS, AS&M, or ACCEL runners are mandrel-bent tubing -- which are smooth throughout. No pinching.
Not even close to what my point was. Sun getting to you down in Phoenix?
FWIW, I also commented on the viability of siamesing longtube intakes but don't feel it necessary to repeat myself ad nauseam.