Balor_Gr

As the question. I see many people using manley TT or carillos both without carr/625+ bolts.
Im in the plans of building an LSVTEC since i got a b16b block with a 550-600 whp target.Tartget rpm 9000 max.
Id like not to stay with standart h-beam and arp2000 like eagle BC manley just for the peace of mind and because of the extra stress the poor rod/stroke ratio creates.

Options im considering:
1)You can allways go for nornal eagle/manley/Skunk2 etc h-beams and buy extra the arp 625+ bolts. Is there any modification needed on the rods? Bc has this combo ready altho im iffy on BC stuff. Manley had this option off the shelf but they discontinued it....
2) Upgraded rods with standard arp2000/wmc bolt like Manley Turbotuffs or carillo H beams or pauters . My problem with this (except the carrillo) is that the upgraded rods are very heavy and might
create more tension to the arp2000 bolts.
3)Overkill AF with getting both upgraded rods with upgraded bolts , and i dont think ill ever need this option.

TheShodan

iTrader: (14)

You don't need those +625 ARPs until you get to the 800+ whp, drag race systems. What you're going to use now, like the arp2000s, is more than enough for your goals. If you want to go overboard for your own reasons , then it's your money, and resources.

But I'll tell you know you don't need +625ARPs.

AZ_CIVIC

iTrader: (1)

I saw this post from Tepid1 from a while back.

"The reason you'd need the aged 625 is due to rod weight, piston weight and high rpm.

The goal is to prevent rod cap separation, which is exactly why you would want to upgrade. For Manley TT's I would use the stronger bolts, but that's just me with a drag racing mindset.

What pistons are you using?

I use ARP 2000's on my aluminum rods with great success. Many make 1100+ with these and it's not a problem. Only difference is rod/piston weight.

Also, when you order the Manley TT's all you have to do is add an "R6" to the rod part number and it comes fitted with the 625 bolts.

Part number, if I remember correctly, is 42321. "

TheShodan

iTrader: (14)

I guess. That's really a vague reason to use them. Very general reasoning with no criteria other than weight, rpm, piston... And nothing else

bigG

iTrader: (6)

Along with stroke, its pretty much what every engine builder goes by when choosing rod bolts. Manley rods do have some weight. If you decide to go over 9500 rpms and have upgraded wristpins, I would get the bolts. Hp limit will be the rod, not the bolts.

extremeracer

I made 550 - 600 whp on Eagle rods and L19 fasteners added just for extra peace of mind. There is of course a chance that the Eagle rod itself would bend/break before the ARP2000 bolt but that was the setup I went with. Rev limit was 9200rpm.

It is also much more cost effective going with a decent H-beam and buying a set o 8 x L19 rod bolts direct from ARP than using the manufacturer supplied CA625+ stuff or a heavier I beam rod -provided your power goal stays under the 600whp range. For over 600whp or 9000rpm+ a set of Turbo Tuff or other I-beam probably makes more sense.

Also look at the Manley H-Tuff rod which falls midway between their standard H-beam and TT I-beam. Because B-series engines don't produce huge torque numbers or torque at a low rpm (like a 4G63 or SR20 for example) the rods aren't put through huge compression forces - the concern here becomes high rpm stretch which in theory is what an upgraded bolt addresses.

Well this is my theory at least...

Balor_Gr

Ok once again thank to the realstreetperformace that has some extensive data on their site, rod weights:
BC sportsman 538 g
Eagle 535 g
Manley H 520 g
Manley TurboTuff 555 g
Pauter X 554 g
Skunk2 alpha 538 g
K1 501 g
Carrillo PRO-H 510 g

To my surpise last week i saw this 510 grams Carillo pro-h had and i was kinda amased.

On the other hand since everyone can rev to hell with apr2000 + aluminium rods yes id say its all about rpm+rod/stroke ratio + piston + pin + rod weight.
My pistons are sc7071 (84mm mini dish) they weight 307 grams id say they are ok to slightly heavy pistons. On stock piston pins.
Since people did some very good numbers on the classic manleys AND they are lighter id go with them Ill consider the arp L19 tho. Anyone has the code for the universal L19 bolts?( edit also i hope they are sealed...)