Lord_fahrquhar 2,580 Posted September 25, 2017 Hey crossflow lovers (esp ando and rob) What Arp bolts are good for heads and mains? Heard it was holden items from previous searches but just want to confirm what both you guys have used. Cheers Dave 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,304 Posted September 25, 2017 if your not using a girdle arp do a stud kit to suit crossflow,i used one in my new engine,2000 series bolts. Share this post Link to post Share on other sites
slydog 7,873 Posted September 25, 2017 Performance Wholesale do the head studs in a kit. Maybe even the mains too but the main studs are 351 windsor size from memory? Happy to be wrong but bolt spec would be easy enough to sort and convert to stud. Share this post Link to post Share on other sites
ando76 4,354 Posted September 25, 2017 I use 302 w main stud kits with my stud girdles and I bought the head studs individually from summit when the dollar was good. I'll have the individual part number somewhere. But to be honest with the dollar being not so good, it would be cheaper and easier to buy the lot from Performance Wholesale. Share this post Link to post Share on other sites
Lord_fahrquhar 2,580 Posted September 26, 2017 Cheers team Looking to do just that. Got the 302w bolts on the way and some goodies from summit Share this post Link to post Share on other sites
LJDB 103 Posted September 27, 2017 Just to keep this going. What's the limits of stock bolts and main killer or reason to upgrade? Share this post Link to post Share on other sites
slydog 7,873 Posted September 27, 2017 Harmonics flog em out at RPM pretty well. Limits,plenty of cheap valve spring xflows with turbos hanging off the side (still slower then good NAT ASP 1's BTW) that you could ask maybe ? Most NAT ASP guys build em properly cos xflows break all the same shit in the same manner till you do all the have too's on em LOL. Other benefits are easier to assemble and disassemble. Heck I main studs,head studs,pan studs,manifold studs,carb studs,exhaust studs and if I could I'd run block studs for the gear box but you don't have enough room to mount it all while in the car.Stud's are da bom to work with. 1 Mustardxf2 reacted to this Share this post Link to post Share on other sites
broken-wheel 659 Posted November 19, 2017 INLET - ARP 400-2403 these are carb stud kits you need 3 EXH - ARP 435-2101 CAM PALTE - ARP 234-1001 FLEXPALTE - ARP 200-2302 SUMP STUDS - ARP 245-1901 ARP HEAD STUD - AR5-250-1LB ARP HEAD STUD WASHER - APW1316N ARP HEAD STUD NUT - APN12-1 Mains I reused stock, never failed on me, with a girdle I use the 300CI studs, they come in a pack for the US 300ci 6 cyl Share this post Link to post Share on other sites
adrianphu123 73 Posted November 19, 2017 Do the torque specs for rod bolts, main and head studs remain the same as factory? The factory specifies 35NM while ARP specifies 35 ft lb (40 NM), Does it matter? Share this post Link to post Share on other sites
gerg 10,871 Posted November 19, 2017 As the the steel behaves differently from one alloy to another, you go with whatever the bolt manufacturer reckons is right. They have also factored in the different torque requirements of the fine thread vs coarse ie: a fine thread will have a higher tension on the bolt than a course one for a given torque setting.It may well be that the stronger alloy needs more tension on it to "stay tight". I would get the block line-honed with the studs already installed and torqued as the higher tension will distort the block more than standard ones.Sent from my CPH1607 using Tapatalk Share this post Link to post Share on other sites
bear351c 10,270 Posted November 19, 2017 13 hours ago, gerg said: you go with whatever the bolt manufacturer reckons is right. Yep, this.....^ ^ ^ ^ Don't forget to use the lube on the washers/nuts/under the bolt heads. 2 Valvebouncer and gerg reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted November 20, 2017 I used moly on the threads and heads when i torqued mine down... Smooth as butter right up to the "click" with no grindy noises or chatter Sent from my CPH1607 using Tapatalk 1 bear351c reacted to this Share this post Link to post Share on other sites