read DMs/my profile login | join CAFords | search | faq |

» Northern California Ford Owners     » Automotive   » Tech Talk   » R blocks question

Email this post to someone!

Author Topic: R blocks question Joshs Ford ¯ Member # 801 posted                              With regular 302 and 351 blocks, I thought the most you should bore them out to is .40 over. That 30 over was ok, and 40 over was pushing it. Is this ture or false. Then if it is true, how is Ronnie Wilson (5.0 Mustang & Super Fords October 2003 issue, page 181) able to have a 4.100 bore on his R302 block? Right now he has a359 ci engine (4.100 bore and 3.400 stroke), and he says he is soon to have a 438 winsor. Any one able to help me? Posts: 692 | From: San Ramon CA, | Registered: Jan 2002  |  : BOUNTY HUNTER VERT ¯ Member # 2754 posted                              false you can go .060 on both i have seen larger than that before too. -------------------- 89 Saleen vert Bounty Hunter racing http://www.corral.net/photopost/showphoto.php?photo=1324&papass=&sort=1&size=medium&thecat= Its all stock and slow wanna run. Posts: 899 | From: ca | Registered: Apr 2003  |  : BOUNTY HUNTER VERT ¯ Member # 2754 posted                              r302 blocks have thicker sleves so you can go with a larger overbore -------------------- 89 Saleen vert Bounty Hunter racing http://www.corral.net/photopost/showphoto.php?photo=1324&papass=&sort=1&size=medium&thecat= Its all stock and slow wanna run. Posts: 899 | From: ca | Registered: Apr 2003  |  : Joshs Ford ¯ Member # 801 posted                              yea cause damn, that guy now has a bore of 4.1, which is pretty cool. Whats the max overbore with an R block? Thanks a lot. Posts: 692 | From: San Ramon CA, | Registered: Jan 2002  |  : BOUNTY HUNTER VERT ¯ Member # 2754 posted                              ive heard of .100 but i dont know of anything bigger than that -------------------- 89 Saleen vert Bounty Hunter racing http://www.corral.net/photopost/showphoto.php?photo=1324&papass=&sort=1&size=medium&thecat= Its all stock and slow wanna run. Posts: 899 | From: ca | Registered: Apr 2003  |  : mustanggt5091 All I need is..... Member # 444 posted                              .100 holly s**t! Ive heard of .060 being just fine but heating problems can happen as well as block damage on certain blocks, but damn thats a big overbore!!!!! -------------------- 88 GT 357w (SOLD):( 06 Limited Edition R6 !!!!! Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  : jmcclesk Moderator Member # 1355 posted                              I have done a lot of 302 blocks and i think .040 is pushing it. Ford says you can go out to .125 on the r block. I have the sona ray check on my r-302 and i can tell you the walls are THICK. The walls on my r-302 are between, .340-.400 thick. The last b-50 block i had the walls were like .095-.125 thick. you get what you pay for. -------------------- Ford trained ASE master tech. Posts: 4024 | From: marrysville | Registered: May 2002  |  : yellow67stang ¯ Member # 903 posted                              I just got done boring a R block 4.125. There was plenty of room. And I also bored my w-block(351) 4.155. Eric -------------------- I like cars. Posts: 371 | From: Ca. | Registered: Feb 2002  |  : jmcclesk Moderator Member # 1355 posted                              [ August 25, 2003, 05:07 PM: Message edited by: jmcclesk ] -------------------- Ford trained ASE master tech. Posts: 4024 | From: marrysville | Registered: May 2002  |  : Joshs Ford ¯ Member # 801 posted                              God damn yellow stang, thats a lot of boring. Nice job. And thnx for all the info guys; bounty hunter vert, jmcclesk, and yellow stang. BTW, jmcclesk, my 97 F-150 truck is having some issues with the headlights. Any way you could help me. Maybe if I take it into you i coudl get a discount or something? They dont turn on sometimes, and then i have to giggle the windshield wipers lever and they go on, sometimes. thanks everyone Posts: 692 | From: San Ramon CA, | Registered: Jan 2002  |  : jmcclesk Moderator Member # 1355 posted                              Call me i may be able to fix this one over the phone 916-395-6747 -------------------- Ford trained ASE master tech. Posts: 4024 | From: marrysville | Registered: May 2002  |  : Joshs Ford ¯ Member # 801 posted                              are you able to overbore these R blocks with both the cast iron version as well as the aluminum version? Or going to 1.25 overbore only for one or the other? Posts: 692 | From: San Ramon CA, | Registered: Jan 2002  |  :

Printer friendly view of this Ford topic

Hop To: Select a Forum: Category: Automotive -------------------- Tech Talk Drag Racing Road Racing, Auto X & Drifting Events/Shows/Cruises General Talk Street Racing Category: Commerce -------------------- FOR(D) SALE: non-automotive classifieds Vendor's FOR SALE Section

Questions/Requests/Suggestions? email CAFords



Fueled by Ford Mustang Owners
on CaliforniaFords.com