Torque- How to make it?
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What are the major factors in making a majorly grunty YB? Most 500BHP engines you see are around 450Lbs/ft, and the further up the power you go the more torque you seem to loose.
Is it possible to make 500Bhp and 500Lbs/ft on a T4 YB?
Is it just a case of running a huge boost spike with sensible cams? Most of the other internals will be std items except low comp pistons
Is it possible to make 500Bhp and 500Lbs/ft on a T4 YB?
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got the head back yesterday, so should be back together monday and get it MOT'd and insured asap
...then wait for the 7" 4x4 diff to shit it's self since its not 2wd
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#8
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Originally Posted by RWD_cossie_wil
Most 500BHP engines you see are around 450Lbs/ft, and the further up the power you go the more torque you seem to loose.
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#9
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Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
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The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
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Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
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The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
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#13
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Originally Posted by MadRod
Originally Posted by RWD_cossie_wil
Most 500BHP engines you see are around 450Lbs/ft, and the further up the power you go the more torque you seem to loose.
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#14
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Originally Posted by RWD_cossie_wil
Originally Posted by MadRod
Originally Posted by RWD_cossie_wil
Most 500BHP engines you see are around 450Lbs/ft, and the further up the power you go the more torque you seem to loose.
![Wink](https://passionford.com/forum/images/smilies/icon_wink.gif)
![](https://img.photobucket.com/albums/0703/MADRod/DYNOGRAPH.jpg)
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#17
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Originally Posted by Stavros
Did you not see the mental torque and powerband his "normal" old T4 and 8inj engine made? Thats was summat like 504bhp and 540lbft if i remember right.
@ 37psi boost, 492 lb/ft @ 4500 rpm, 504bhp @ 7000rpm
T4 and 8inj, but cant remember if it was a std stroke,bore or rod length.
#18
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Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
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Mark
#19
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Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
#20
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did staffy not lose torque when he changed his managment
what type of torque did the old touring car spec engines make as they were apparently over 500bhp
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what type of torque did the old touring car spec engines make as they were apparently over 500bhp
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dont think kev sharp ever got a figure for his escort did he? as that must have had some power and was that not classed as touring car spec.
what torque does euans car make?
what torque does euans car make?
#23
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Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
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Mark
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Originally Posted by Charlie Chalk
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
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In regards to ECU's making more power i know fuck all about it to be honest but at a stab in the dark would it be because you can map a car better on newer engine managment than you can on old style managment, so you get the best from the engine thus more power?
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
Good topic this
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#27
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Originally Posted by GARETH T
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
Mark
#28
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Originally Posted by Daviet
did staffy not lose torque when he changed his managment
what type of torque did the old touring car spec engines make as they were apparently over 500bhp
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
![Surprised](https://passionford.com/forum/images/smilies/bigcry.gif)
what type of torque did the old touring car spec engines make as they were apparently over 500bhp
Mark
#32
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Originally Posted by Gatecrasher
Originally Posted by Charlie Chalk
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
![Big Grin](https://passionford.com/forum/images/smilies/icon_biggrin.gif)
In regards to ECU's making more power i know fuck all about it to be honest but at a stab in the dark would it be because you can map a car better on newer engine managment than you can on old style managment, so you get the best from the engine thus more power?
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
Good topic this
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
#34
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Originally Posted by Mark Shead
Originally Posted by Daviet
did staffy not lose torque when he changed his managment
what type of torque did the old touring car spec engines make as they were apparently over 500bhp
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
![Surprised](https://passionford.com/forum/images/smilies/bigcry.gif)
what type of torque did the old touring car spec engines make as they were apparently over 500bhp
Mark
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#36
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Originally Posted by Mark Shead
Originally Posted by Gatecrasher
Originally Posted by Charlie Chalk
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
![Big Grin](https://passionford.com/forum/images/smilies/icon_biggrin.gif)
In regards to ECU's making more power i know fuck all about it to be honest but at a stab in the dark would it be because you can map a car better on newer engine managment than you can on old style managment, so you get the best from the engine thus more power?
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
Good topic this
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
#37
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Originally Posted by Mark Shead
Originally Posted by GARETH T
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
Originally Posted by Mark Shead
Originally Posted by RWD_cossie_wil
so a T4 on std cams and a lightly ported head should get close to 500Lbs/ft?
It's running 2.5Bar spike+ held boost
, not had chance to get it RR'd yet.
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
The sum of a engine is just more than a small port head and low comp pistons, To get 500ftlb the engine will need to be a little more trick than that.
Mark
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
Mark
Mark
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#38
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Originally Posted by Bosch_Dealer
...firstly you wont be able to physically run 2.5 bar boost thru a lightly ported head...the max will be 1.5bar or its surge city..i know i tried it!
to stop surge im checking my msd mapping sheet now boost is capped at 22 psi > 4700 rpm, 25 psi > 5400 rpm and 32 psi >7800 rpm
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i am certain ive lost some torque by doing this but i see it as a good thing as my gearbox and diff will last longer.
once u get up the revs abit the engine will consume it but 32 psi at 4000 rpm well
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#39
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Originally Posted by Bosch_Dealer
...firstly you wont be able to physically run 2.5 bar boost thru a lightly ported head...the max will be 1.5bar or its surge city..i know i tried it!
I have just done a completly stock RS500 2bar boost at 4k no surge, Realy awsome bit of kit
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Mark