Congratulations to vtecmec for winning May/June's Lude Of The Month, with his DIY Turbo BB1 build.

>>> Click Here For Profile <<<

Image

spoke to tuners today, here's what they say

No, not in the key of C. An H is likely involved though ...
User avatar
Teddy92110
Posts: 119
Joined: Thu Jan 08, 2015 4:40 am
My Generation: 4G

Post by Teddy92110 » Thu Jan 15, 2015 4:35 pm

jobby lol. Thats in the long run anyway....

User avatar
RattyMcClelland
Moderator
Posts: 9191
Joined: Wed Aug 04, 2010 10:02 pm
My Generation: 5G
PSN GamerTag: RattyMcClelland
Location: Leicestershire
Been thanked: 181 times

Post by RattyMcClelland » Thu Jan 15, 2015 4:36 pm

You can hit around 300bhp or around the 6-9 psi Mark on stock internals and you should be fine however for ultimate piece of mind then sleeving the block is the way forward.

But it's the torque you want to increase . Increasing power buy 20-40bhp won't make a massive difference to performance compared to increasing torque.


I'm on 290ish bhp and 225ish lbft at 6.3psi on my supercharger. Engines runs sweet but it's all in the tune.

I can run 9psi but I dare not yet as the rings may give in.
Image

User avatar
Teddy92110
Posts: 119
Joined: Thu Jan 08, 2015 4:40 am
My Generation: 4G

Post by Teddy92110 » Thu Jan 15, 2015 4:43 pm

Right so your running a supercharger. Is a supercharger more smooth when it comes to vtec kicking in cos ive seen some vids where vtec has kicked in and everything goes mental like losing traction and all that

User avatar
Merlin
Moderator
Posts: 12292
Joined: Fri Aug 06, 2010 9:04 am
My Generation: 5G
PSN GamerTag: Merlinbadman
Location: Edinburgh
Has thanked: 29 times
Been thanked: 190 times

Post by Merlin » Thu Jan 15, 2015 4:43 pm

Good point Ratty, BHP isnt everything.

With the ATR H22a7 intake manifold (and associated mods) you can see torque increase from roughly 130lb/ft @ 3K rpm to 160ish lb/ft @ 3K rpm. This makes a huge difference to the drivability of the car, more oomph and more oomph low down.

Peak torque in my 4th gen is 180-190 lb/ft and that is NA (OEM engines make around 150-155 lb/ft peak).
Image
BA8......... BB4......... BB8.........The JDM Muscle Bus

User avatar
Teddy92110
Posts: 119
Joined: Thu Jan 08, 2015 4:40 am
My Generation: 4G

Post by Teddy92110 » Thu Jan 15, 2015 5:50 pm

Wouldnt it be cheaper to get an atr engine off ebay and stick it in as ive seen a full engine package for £995 then a remap.

User avatar
chrismc
Posts: 517
Joined: Mon Jan 30, 2012 10:30 am
My Generation: 4G
Location: Highworth, Wilts

Post by chrismc » Thu Jan 15, 2015 6:19 pm

Merlin wrote:Good point Ratty, BHP isnt everything.

With the ATR H22a7 intake manifold (and associated mods) you can see torque increase from roughly 130lb/ft @ 3K rpm to 160ish lb/ft @ 3K rpm. This makes a huge difference to the drivability of the car, more oomph and more oomph low down.

Peak torque in my 4th gen is 180-190 lb/ft and that is NA (OEM engines make around 150-155 lb/ft peak).
stock H22A7 ATRs I've seen (my own included) will only make 160lbs/ft peak! Pre- VTEC peak is maybe 135lbs/ft @ 5xxxrpm

130lbs/ft @ 3000rpm is pretty fanciful to my mind...
95 UKDM BB1 VTEC (retired)
2019 mk7.5 Golf GTD
2000 UKDM CW Integra R

User avatar
wurlycorner
Ye are glad to be dead, RIGHT?
Posts: 21205
Joined: Sat May 19, 2012 3:33 pm
My Generation: 4G
Location: Chelmsford, Essex
Has thanked: 1929 times
Been thanked: 236 times

Post by wurlycorner » Thu Jan 15, 2015 7:59 pm

What power were ddoubledanny and sir_si running on their turbo motors that didn't last? Didn't think either of them were wound up particularly high? (as in less than 300bhp)
Simons first 2 even had mahle pistons.

User avatar
RattyMcClelland
Moderator
Posts: 9191
Joined: Wed Aug 04, 2010 10:02 pm
My Generation: 5G
PSN GamerTag: RattyMcClelland
Location: Leicestershire
Been thanked: 181 times

Post by RattyMcClelland » Thu Jan 15, 2015 8:06 pm

I think overboost is the problem on turbos and that's what kills the H22 engine when it runs lean.

I think both were around 270bhp at the fly.
Image

User avatar
Teddy92110
Posts: 119
Joined: Thu Jan 08, 2015 4:40 am
My Generation: 4G

Post by Teddy92110 » Thu Jan 15, 2015 11:12 pm

How about on vtec will it not spin out or is there something you can do to sort that such as lower the vtec to where the turbo kicks in

User avatar
Merlin
Moderator
Posts: 12292
Joined: Fri Aug 06, 2010 9:04 am
My Generation: 5G
PSN GamerTag: Merlinbadman
Location: Edinburgh
Has thanked: 29 times
Been thanked: 190 times

Post by Merlin » Fri Jan 16, 2015 9:14 am

chrismc wrote:
Merlin wrote:Good point Ratty, BHP isnt everything.

With the ATR H22a7 intake manifold (and associated mods) you can see torque increase from roughly 130lb/ft @ 3K rpm to 160ish lb/ft @ 3K rpm. This makes a huge difference to the drivability of the car, more oomph and more oomph low down.

Peak torque in my 4th gen is 180-190 lb/ft and that is NA (OEM engines make around 150-155 lb/ft peak).
stock H22A7 ATRs I've seen (my own included) will only make 160lbs/ft peak! Pre- VTEC peak is maybe 135lbs/ft @ 5xxxrpm

130lbs/ft @ 3000rpm is pretty fanciful to my mind...
Maybe it is because all the preludes with ATR intake manifolds's are tuned? I do concede that an ATR IM does not necessarily jump you up straight up to 160lbs/ft @3K rpm, I was quoting my own engine, but it wont be far away from that level when you have the supporting mods.



130lbs/ft @ 3000rpm is only 74 bhp. From my experience stock/relativity stock H22's seems to put out around 130lbs/ft @ 3000rpm. The difference in yours and my experience could be down to the fact that a stock Lude will have dual runner intake manifold and resonator, which is designed to increase low end torque, and the ATR doesnt?

My stock H22a8 (Type-S/H22a8 intake and OEM resonator) on a Maha - 130lbs/ft @ 3000rpm
Image

and on a Dastek - 128lbs/ft @ 3000rpm
Image

And the majority on the old PUK dyno thread where around 130lbs/ft @ 3000rpm http://preludeuk.forumup.com/viewtopic. ... =preludeuk
Image
BA8......... BB4......... BB8.........The JDM Muscle Bus

Post Reply

Return to “Tuning”