4hp22 vs 4hp24 do I upgrade?
Moderator: phpBB2 - Administrators
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm
4hp22 vs 4hp24 do I upgrade?
Quick query.
I'm upgrading a 4.0 gems RV8 Landrover 90.
Changing the chassis, so everything is accessible and will be moved across at some point, so I'm upgrading, refreshing and rebuilding other bits too.
It's going to get a nicely tuned 4.6 top hat probably with a 270 or 275 cam.
Ported heads and large valves.
Current trans is the standard 4hp22.
I am considering upgrade to 4hp24 for longevity
(Either going compushift or a rebuilt trans with the hydro mech valve block)
Is it worth it?
I did run this engine spec on a RRC which had a 4hp22, and although I had no problems, it didn't always feel completely solid.
Any advice gratefully received.
Thanks,
Mike.
I'm upgrading a 4.0 gems RV8 Landrover 90.
Changing the chassis, so everything is accessible and will be moved across at some point, so I'm upgrading, refreshing and rebuilding other bits too.
It's going to get a nicely tuned 4.6 top hat probably with a 270 or 275 cam.
Ported heads and large valves.
Current trans is the standard 4hp22.
I am considering upgrade to 4hp24 for longevity
(Either going compushift or a rebuilt trans with the hydro mech valve block)
Is it worth it?
I did run this engine spec on a RRC which had a 4hp22, and although I had no problems, it didn't always feel completely solid.
Any advice gratefully received.
Thanks,
Mike.
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm
Mm that sounds nice ...
What's the torque like on that setup?
In my current layout, it feels quite flat in top gear at 2250 to 2700 rpm.
At 2800 it's coming on song, and pulling really well at 3000 ( about 90 mph)
Yes, if I floor it, it'll rev up in third and go like a train, but it feels boggy low down in lockup top.
What's the torque like on that setup?
In my current layout, it feels quite flat in top gear at 2250 to 2700 rpm.
At 2800 it's coming on song, and pulling really well at 3000 ( about 90 mph)
Yes, if I floor it, it'll rev up in third and go like a train, but it feels boggy low down in lockup top.
Not as torquey as the Torquemax cam I had before, but more than adequate. And it keeps pulling around to the upshift point, whereas the Torquemax seemed to be running out of puff a bit. I certainly wouldn't describe it as 'flat' anywhere!Captainbeaky wrote:Mm that sounds nice ...
What's the torque like on that setup?
In my current layout, it feels quite flat in top gear at 2250 to 2700 rpm.
At 2800 it's coming on song, and pulling really well at 3000 ( about 90 mph)
Yes, if I floor it, it'll rev up in third and go like a train, but it feels boggy low down in lockup top.
Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm
Are you sure it's not a tune problem? Have you got a wideband O2 so know what the mixture is actually doing where it feels 'boggy'?Captainbeaky wrote:Mm that sounds nice ...
What's the torque like on that setup?
In my current layout, it feels quite flat in top gear at 2250 to 2700 rpm.
At 2800 it's coming on song, and pulling really well at 3000 ( about 90 mph)
Yes, if I floor it, it'll rev up in third and go like a train, but it feels boggy low down in lockup top.
My bog standard Vitesse unit always felt very 'flat' at low revs but flew on full throttle at over 3000 or so. Fitting a Megasquirt made it also pull like a train at low revs - it was running far too weak with the standard set-up other than at full throttle.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Yes - I've looked at a standard flapper with a wideband O2 sensor and it ran very weak indeed at low throttle openings/low revs. Only went rich enough on full throttle.JSF55 wrote:When I fitted the megajolt to mine it transformed the bottom end torque of the engine, probably the biggest single boost it was given
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
-
- Newbie
- Posts: 44
- Joined: Mon Mar 03, 2014 10:02 pm