Choosing an Engine for my Ultima Build
Discussion
I believe that the ford cammer would really push the limits of width that the car will accept. How about a short stroke big bore LS with some All Pro or AFR heads? Add a 8 into one exhaust and a Harop I.R. manifold toss in a Daily dry sump system. Rev to the moon, sounds like a Ferrari with a set of balls and is relatively inexpensive. Lee
ROWDYRENAULT said:
... How about a short stroke big bore LS with some All Pro or AFR heads? Add a 8 into one exhaust and a Harop I.R. manifold toss in a Daily dry sump system. Rev to the moon, sounds like a Ferrari with a set of balls and is relatively inexpensive. Lee
This...I think this would provide a nice change of character compared to the more run of the mill LS's ( although I would look at an LT as well) and be FAR more cost efficient/ FAR less hassle. It's easy to get caught up in the appeal of something like a fezzer/lambo/audi/vw v8/v10/v12/w16 but my impression is that the integration gets far too complicated and expensive quickly whilst delaying your build by many months or years.
Although I do look at videos on YT featuring 4 rotor wankels and think what if..
F.C. said:
300bhp/ton said:
What about a TVR AjP flat plane crank V8 or maybe the flat plane Coyote engine?
Coyote is a stonking platform but too wide for Ultima engine bay I think.Does anyone use the Chrysler Hemi engines at all? Not sure there is any advantage over a Chevy, but makes for an alternative.
ROWDYRENAULT said:
I believe that the ford cammer would really push the limits of width that the car will accept. How about a short stroke big bore LS with some All Pro or AFR heads? Add a 8 into one exhaust and a Harop I.R. manifold toss in a Daily dry sump system. Rev to the moon, sounds like a Ferrari with a set of balls and is relatively inexpensive. Lee
Lee - what’s the approximate cost for this type of engine, ex exhaust? This is what you’re doing on current build isn’t it? What numbers are you expecting?fortunately for me, the fellow who started the GTR that I am now completing had already acquired the engine from my engine builder. Its an RHS block, All pro heads, Dailey dry sump, Harop intake 427 cu inch monster. It will run on a complete Motec system the ECU is a M130 it has a color Motec dash with a Motec Power Distribution system and the Raptor wireless steering wheel. The receipts on the motor total $51,000 including the Motec equipment. The motor should make 700 hp and 650 ft lbs on a 7000 rpm red line. I bought this total project for dimes on the dollar and at this point it would be very difficult to go backwards to the engine that I would have built
if I had speced it. The rest of the engine is of the same quality that I have listed above. I don't think you are going to save a bunch of money from what I show above on the short stroke big bore motor that I believe would better suit the car. The RHS block is $4k but if you look at the 6 bolt heads and priority oiling if your going to rev to 8k you need the stability the RHS block offers. you could go to a single throttle body that would save 5-6k and you could save some money on the Motec by going to a cheaper solution but you get what you pay for. If you did the build yourself I think you might get it down to 30k.???
if I had speced it. The rest of the engine is of the same quality that I have listed above. I don't think you are going to save a bunch of money from what I show above on the short stroke big bore motor that I believe would better suit the car. The RHS block is $4k but if you look at the 6 bolt heads and priority oiling if your going to rev to 8k you need the stability the RHS block offers. you could go to a single throttle body that would save 5-6k and you could save some money on the Motec by going to a cheaper solution but you get what you pay for. If you did the build yourself I think you might get it down to 30k.???
BogBeast said:
This...
I think this would provide a nice change of character compared to the more run of the mill LS's ( although I would look at an LT as well) and be FAR more cost efficient/ FAR less hassle. It's easy to get caught up in the appeal of something like a fezzer/lambo/audi/vw v8/v10/v12/w16 but my impression is that the integration gets far too complicated and expensive quickly whilst delaying your build by many months or years.
Although I do look at videos on YT featuring 4 rotor wankels and think what if..
If you go to far off from standard you will lengthen your build time and if you can’t fabricate parts you will have to pay big money and wait longer for them, nothing fits where it supposed to, you will also find that there’s not a lot of room in the engine bay to fit everything in. I’ve gone LS twin turbo and I recon it’s been 4 years just on this and that’s with an engine that fits to start with. I would still do it again thoughI think this would provide a nice change of character compared to the more run of the mill LS's ( although I would look at an LT as well) and be FAR more cost efficient/ FAR less hassle. It's easy to get caught up in the appeal of something like a fezzer/lambo/audi/vw v8/v10/v12/w16 but my impression is that the integration gets far too complicated and expensive quickly whilst delaying your build by many months or years.
Although I do look at videos on YT featuring 4 rotor wankels and think what if..
had lunch with my engine builder he agree with the 30k no labor. Rev to 8500 675 to 700 hp but not near as much bottom end torque. which to me is the right way to go.This would be a short deck RHS block 4.185 bore. Winds up at 340 plus cubic inches. Add an 8 into 1 exhaust which I had on my old GTR and this thing would sound like something I can't imagine. it would be a good street motor because you wouldn't have all that torque on the bottom end to content with. Also the stock Porsche transaxel gear sets would work better because of the higher revs.
In the interests of balance why not choose something a little different? I’m just about to start building a GDT70 with a F136 engine from a Maserati QP mated to a 997 Aisin transaxle. It’s not without challenges as folk have said - most notably a ‘little’ rework of the framework to clear the twin OH cams as she’s a tad broader over the heads than an LS. However, I’m in no hurry and as an engineer a lot of this is about the journey. Currently awaiting delivery of my bespoke flywheel and engine-box adapter plate to finish that assembly before building a mock back end to prove the mods work. After that down to the wonderful folk at GD to incorporate into the real chassis due to be slotted in June/July time. 3D printers are great for proving ideas.
why not choose something a little different? I’m just about to start building a GDT70 with a F136 engine from a Maserati QP mated to a 997 Aisin transaxle. It’s not without challenges as folk have said - most notably a ‘little’ rework of the framework to clear the twin OH cams as she’s a tad broader over the heads than an LS. However, I’m in no hurry and as an engineer a lot of this is about the journey. Currently awaiting delivery of my bespoke flywheel and engine-box adapter plate to finish that assembly before building a mock back end to prove the mods work. After that down to the wonderful folk at GD to incorporate into the real chassis due to be slotted in June/July time. 3D printers are great for proving ideas. Gassing Station | Ultima | Top of Page | What's New | My Stuff