Has anyone tried to fit an LS7 into a Cerbera or Tuscan?
Discussion
Before you go down this route,get your self outer measurements of the ls'7's intergrated dry sump pump from the crank pulley centre,you may find these to be wider than width of the bottom chassis rails.
IMHO, a Darton sleeved ls1,2,6 may be the way to go if your looking for the cubes,personaly I would go for lower displacment and a engine that revs's its nuts off,torque will kill your train.
Speak to Mike aka Boosted,he's the man,Hi Mike....
IMHO, a Darton sleeved ls1,2,6 may be the way to go if your looking for the cubes,personaly I would go for lower displacment and a engine that revs's its nuts off,torque will kill your train.
Speak to Mike aka Boosted,he's the man,Hi Mike....
Edited by v8sag on Tuesday 11th March 01:42
The components that set the limit for high RPM are the valve train before the rotating assembly.
Most of the stroker kits use 4" stroke crankshafts which are stronger than the stock 3.622", with a decent set of rods with good rod bolts and some good pistons you could easily be looking at your rev limit being 7k, if you have a good set of heads.
If you wanted to take an LS engine past 7.5k you would need to spend most of your money on a titanium valve train, then you be looking at light weight pistons and rods, light weight does mean more expensive and not as strong, unless you go really expensive.
Still that crank might be useful for anyone running in the Tuscan challenge but wanting to use an LS engine block but still meet the 5litre class limit...
And stepr1 you don't have to have an LS7 to get the performance of an LS7, if you are serious talk to Boosted about what you want from your engine, he would be able to give you a good idea of what you would need to get the performance you want.
Most of the stroker kits use 4" stroke crankshafts which are stronger than the stock 3.622", with a decent set of rods with good rod bolts and some good pistons you could easily be looking at your rev limit being 7k, if you have a good set of heads.
If you wanted to take an LS engine past 7.5k you would need to spend most of your money on a titanium valve train, then you be looking at light weight pistons and rods, light weight does mean more expensive and not as strong, unless you go really expensive.
Still that crank might be useful for anyone running in the Tuscan challenge but wanting to use an LS engine block but still meet the 5litre class limit...
And stepr1 you don't have to have an LS7 to get the performance of an LS7, if you are serious talk to Boosted about what you want from your engine, he would be able to give you a good idea of what you would need to get the performance you want.
You peeps may be interested in this, but I don't know:
http://www.pistonheads.com/gassing/topic.asp?h=o&a...
some pics:
http://www.pistonheads.co.uk/members/showcar.asp?c...
A big hello to Richard
http://www.pistonheads.com/gassing/topic.asp?h=o&a...
some pics:
http://www.pistonheads.co.uk/members/showcar.asp?c...
A big hello to Richard
im said:
You peeps may be interested in this, but I don't know:
http://www.pistonheads.com/gassing/topic.asp?h=o&a...
some pics:
http://www.pistonheads.co.uk/members/showcar.asp?c...
A big hello to Richard
bloody hell that looks lovely! just imagine what it would be like with a 700bhp LS7 in there!! http://www.pistonheads.com/gassing/topic.asp?h=o&a...
some pics:
http://www.pistonheads.co.uk/members/showcar.asp?c...
A big hello to Richard
Chris.
7500 rpm on a ls motor ? what cam are you going to run to need that sort of revs !!! even with a 'big cam' they peak at 5500-6000 so why run to that sort of revs, only a race based motor where revs are needed to produce power due to restrictions do you need to rev that hard, my old motor (6.9l) makes 594bhp-609fflb (over 500bhp at wheels) and peaks at 5500rpm. these motors dont need to rev that hard and will last longer if you dont give it such a hard time with big revs,
tinker-27 said:
7500 rpm on a ls motor ? what cam are you going to run to need that sort of revs !!! even with a 'big cam' they peak at 5500-6000 so why run to that sort of revs, only a race based motor where revs are needed to produce power due to restrictions do you need to rev that hard, my old motor (6.9l) makes 594bhp-609fflb (over 500bhp at wheels) and peaks at 5500rpm. these motors dont need to rev that hard and will last longer if you dont give it such a hard time with big revs,
are you kiding?? LS engiens love revs. the stock LS7 revs to 7000rpm as standard! the topend will take an extra 500rpm no problems. a simple cam swap and the power will be pulling all the way to the new red line. it will still pull trees out the ground at low rpm but it will sound amazing at 7500rpm! Chris.
What I think Tinker was referring to is the power band.
The OEM LS7 power drops after 6400 rpm - it will still rev to 7k but is it worth it, aside from the noise?
Once you go high enough that the torque starts dropping off then the harder you push the less return you are going to get, and those bearings are going to need to be good.
The above I think translates to: Stop worrying about big number rpm (much increased wear) and choose the right gear and diff ratios to make use of the power you have.
But I think you already know this... being familiar with ls1tech, they have a thread where this gets mention almost every week though their normal trigger is someone asking why you need to go above 6000 rpm...
The OEM LS7 power drops after 6400 rpm - it will still rev to 7k but is it worth it, aside from the noise?
Once you go high enough that the torque starts dropping off then the harder you push the less return you are going to get, and those bearings are going to need to be good.
The above I think translates to: Stop worrying about big number rpm (much increased wear) and choose the right gear and diff ratios to make use of the power you have.
But I think you already know this... being familiar with ls1tech, they have a thread where this gets mention almost every week though their normal trigger is someone asking why you need to go above 6000 rpm...
Edited by eLSerbera on Thursday 15th May 11:23
im not saying they wont rev but there is very little point in doing it as the power is gone by then,i just think big two valve motors are better at big torque than big revs,where is the peak power of your ls7 revving to 7500?,as i have not seen a dyno graph with peak past 5750 (apart from full race motors),every body that i know that has fitted a ls motor has ended up changing the diff for a bigger ratio to use the grunt which is what they do best,
Iv been speaking to Euphoria racing today, they have done the LS1 and LS7 conversions to both tuscans and cerberas, but now prefer to use the 4.6 ford carb unit, which runs 600bhp and removes the troublesome management unit.
they told me they now use the ford unit as its lighter and a better fit and far less costly, ie £6,000 all in instead of around £13,000 for the LS series conversions.
might be worth contacting them for a view.
they do all the topgear stuff and prepare their cars as well as racing TVRs with the AJp, LS1 & 7 engines and now more recently the 600bhp ford units.
they told me they now use the ford unit as its lighter and a better fit and far less costly, ie £6,000 all in instead of around £13,000 for the LS series conversions.
might be worth contacting them for a view.
they do all the topgear stuff and prepare their cars as well as racing TVRs with the AJp, LS1 & 7 engines and now more recently the 600bhp ford units.
V8loudpedal said:
Iv been speaking to Euphoria racing today, they have done the LS1 and LS7 conversions to both tuscans and cerberas, but now prefer to use the 4.6 ford carb unit, which runs 600bhp and removes the troublesome management unit.
they told me they now use the ford unit as its lighter and a better fit and far less costly, ie £6,000 all in instead of around £13,000 for the LS series conversions.
might be worth contacting them for a view.
they do all the topgear stuff and prepare their cars as well as racing TVRs with the AJp, LS1 & 7 engines and now more recently the 600bhp ford units.
can you provide any contact informations to Euphoria? To whom I would need to talk about Cerbera engine conversions? Thx Chris500they told me they now use the ford unit as its lighter and a better fit and far less costly, ie £6,000 all in instead of around £13,000 for the LS series conversions.
might be worth contacting them for a view.
they do all the topgear stuff and prepare their cars as well as racing TVRs with the AJp, LS1 & 7 engines and now more recently the 600bhp ford units.
V8loudpedal said:
Iv been speaking to Euphoria racing today, they have done the LS1 and LS7 conversions to both tuscans and cerberas, but now prefer to use the 4.6 ford carb unit, which runs 600bhp and removes the troublesome management unit.
I'm not aware of any TVR with an LS7 in - if so I'd be very interested......Gassing Station | TVR Major Mods | Top of Page | What's New | My Stuff