The Chronicles of SneakySnake Vol III

[Scot@Prefix]

RPM kills engines. The whole point of a stroker is a monster, broad TQ curve to create incredible average power over a given time interval. You just can't have it both ways or it would be commonplace already. I think it's a different kind of amazing when I drive around with friends in their Huracans whom need rpm to make power. But that's not the experience the viper is, nor would I want it to be. I like seeing my passengers necks being snapped off from a 4k rpm roll-on. The viper experience (esp modified NA ones) is just unmatched by anything I've ever been in, its absolutely explosive. I often take it for granted until I drive something else, and go ok, waow this feels slow.

A viper crank weighs just under 90 lbs, not including balancer, flywheel/clutch assembly. That gets really heavy as RPM goes up, and durability goes down

[kriskyk]

RPM kills engines. The whole point of a stroker is a monster, broad TQ curve to create incredible average power over a given time interval. You just can't have it both ways or it would be commonplace already. I think it's a different kind of amazing when I drive around with friends in their Huracans whom need rpm to make power. But that's not the experience the viper is, nor would I want it to be. I like seeing my passengers necks being snapped off from a 4k rpm roll-on. The viper experience (esp modified NA ones) is just unmatched by anything I've ever been in, its absolutely explosive. I often take it for granted until I drive something else, and go ok, waow this feels slow.

Although a destroked 9000 rpm twin turbo viper motor would be a riot!

[txA&M08]

That's almost the same as what mine did with 13 to 1 pistons!

Didn't you put 800 to the ground though? Or were you talking about the torque?

[Arizona Vipers]

Didn't you put 800 to the ground though? Or were you talking about the torque?

Yeah, his dyno is whp too right? Mine did 803 on the prefix chassis dyno.

[txA&M08]

Yeah, his dyno is whp too right? Mine did 803 on the prefix chassis dyno.

Alex's readings were from the engine dyno at Prefix

[Arizona Vipers]

Alex's readings were from the engine dyno at Prefix

ahhh ok, yeah makes sense

[Jack B]

Although a destroked 9000 rpm twin turbo viper motor would be a riot!

The crank is still too heavy for 9k

[Whiskey]

The crank is still too heavy for 9k

Billet crank and Ti Rods should do the trick. Because we can use Chevy rods it's almost affordable.

[Whiskey]

RPM kills engines. The whole point of a stroker is a monster, broad TQ curve to create incredible average power over a given time interval. You just can't have it both ways or it would be commonplace already. I think it's a different kind of amazing when I drive around with friends in their Huracans whom need rpm to make power. But that's not the experience the viper is, nor would I want it to be. I like seeing my passengers necks being snapped off from a 4k rpm roll-on. The viper experience (esp modified NA ones) is just unmatched by anything I've ever been in, its absolutely explosive. I often take it for granted until I drive something else, and go ok, waow this feels slow.

You do have a point with that. That's why I couldn't keep the Murcia very long. Then again...the monster TQ these engines make is alway why I'm on Viper #5. We will see how long I can keep it stock.

[Nth Moto]

Looking good Alex, I'm glad Scot and the guys got you situated so quickly!

Billet crank and Ti Rods should do the trick. Because we can use Chevy rods it's almost affordable.

The rotating assembly doesn't mean anything if you don't have the induction system (top end) to support the RPM vs the cubes. 99% of Viper combinations have zero business being anywhere near that RPM regardless of rotating assembly parts. This is coming from people that are doing a titanium connecting rod combination currently.

[slowhatch]

Motor got to VE on Monday but since the shop doesn't revolve around me (**gasp), I'll have to wait until next week till they can fit me into their workflow.







These port covers are pretty cool;



Can see the Cometic HG peeking out here;

[ViperNC]

The excitement and anticipation builds.... Happy days soon!

[Whiskey]

Looking good Alex, I'm glad Scot and the guys got you situated so quickly!



The rotating assembly doesn't mean anything if you don't have the induction system (top end) to support the RPM vs the cubes. 99% of Viper combinations have zero business being anywhere near that RPM regardless of rotating assembly parts. This is coming from people that are doing a titanium connecting rod combination currently.

Well...we kinda do... I remember when Greg Good ported a set of Gen4 heads for me and they flowed 401CFM @ 28". Doing the calculations those heads N/A had the potential for just a touch over 1,038hp So I'd say when with all the right factors in place and giving a conservative estimate we should be able to see 925-950bhp all motor with a BIG Cam. It would need to be huge and not too street-able. Start with something like 295 duration and .650 lift and run it through the simulation and see what it does.

So yes....back to the saying Anything is possible with enough time and money. But you are right it's not easy and turbos make power easily on these cars. N/A power is the hard way.


Not trying to derail your thread. You have a awesome street setup and can't wait to hear how you like it.

[TrackAire]

Looking forward to seeing this car run again.

What is the substance on the intake manifold and valve covers? It almost looks like coolant sprayed on them, dried and was not cleaned off. At first I thought it was dust but not so sure.

[slowhatch]

Looking forward to seeing this car run again.

What is the substance on the intake manifold and valve covers? It almost looks like coolant sprayed on them, dried and was not cleaned off. At first I thought it was dust but not so sure.

I have no idea, but hoping its something I can get after with a a shop rag and some detailing spray.

[SLP]

Any idea of what the function of these fuel rail covers are? I've seen some gen V's with the on and some, without.

Viper Covers_LI.jpg

[Steve M]

Any idea of what the function of these fuel rail covers are? I've seen some gen V's with the on and some, without.

Same question - I was curious if those were just for shipping purposes, or if they are intended to insulate the fuel rails from the additional heat of that engine combo.

[Gen5snake]

Any idea of what the function of these fuel rail covers are? I've seen some gen V's with the on and some, without.

Viper Covers_LI.jpg

My guess is insulation to keep the fuel cool.

[Scot@Prefix]

My guess is insulation to keep the fuel cool.

They are there to help with fuel injector noise, the later replacements are much larger foam pieces that cover the whole area.

[SLP]

Thanks for the reply. Good to know I can run without them. I don't seem to mind the noise and like the look of the bare rails.

[Ghoust]

Great to see the progress of the motor here. I just got mine back and you can't wipe the grin off of my face. It's one of the few things that get me happy in these crazy times.

[slowhatch]

Figured the motor and trans mounts could use a replacement after 7 years...






New gaskets for 3-2 collectors and j-pipes;

[slowhatch]

Yesterday, as promised, Morgan freed up to return the heart back to the beast. All new hardware was used, all exhaust mating surfaces gone over, and we went over the thermal wrapping of a lot of items (that had previously been addressed during the last HC install).



New motor mounts installed;



Old mounts;







Can we please not debate the Belanger pickle for 30 pages, pretty please. I left mine in;




New oil cooler and lines were installed. OEM lines were used. I thought upgraded lines came with the kit from Prefix, but that was a wrong assumption. By the time I realized my oversight Morgan was dropping the motor in and I was left to use what VE had in stock--oem lines it is.

[slowhatch]

512ci left the bay, and 550ci came back;







Motor is in



Clutch back in;



Trans and new mount back in;



Driveshaft re-installed, and aero panel back on;



Since the oem clutch is almost new I decided to skip any upgrades at the moment (that and there is no real reason to upgrade at my power level unless I want to go drag racing). I haven't been traveling to Mexico as often as I did back in my heydays, so the transmission is still in one piece. When I undoubtedly break something in the trans again (shift pads, blockers, synchors, etc), I will upgrade components in the trans and do an nth moto clutch.

[slowhatch]

I firmly believe Morgan can do this stuff blindfolded at this point;



By the end of the day yesterday the car was down on the ground, everything buttoned up, exhaust was on, and fluids filled.